TV Phineas and Ferb - Season 3 Episode 8 : Ask a Foolish Question Phineas and Ferb - Season 3 Episode 8 : Ask a Foolish Question 7.892/10 by 932 users When Candace discovers that Phineas and Ferb have invented a computer that can answer anything, she asks it how she can finally bust her brothers once and for all. Meanwhile, Dr. Doofenshmirtz loses the key to his latest invention, the "All Purpose-inator," and Agent P must find it before he does. Details Casts Posters Images Title Phineas and Ferb - Season 3 Episode 8 : Ask a Foolish Question Alternative Titles Финиъс и Фърб, Phineas e Ferb, Phineas und Ferb, Phineas og Ferb, Phinéas et Ferb, Phineas e Ferb, Phineas en Ferb, Phineas og Ferb, Phineas e Ferb, فارس وفادي, Phineas & Ferb, Phineas och Ferb, Phineas & Ferb, Phineas và Ferb First Air Date 2007-08-17 Last Air Date 2025-07-26 Number of Episodes 249 Number of Seasons 5 Genres Animation, Comedy, Family, Sci-Fi & Fantasy, Networks Disney XD, Disney Channel, Casts Vincent Martella, David Errigo Jr., Ashley Tisdale, Caroline Rhea, Dee Bradley Baker, Alyson Stoner, Dan Povenmire, Jeff 'Swampy' Marsh Plot Keywords , Phineas Flynn (voice) Vincent Martella Ferb Fletcher (voice) David Errigo Jr. Candace Flynn (voice) Ashley Tisdale Linda Flynn-Fletcher (voice) Caroline Rhea Perry the Platypus (voice) Dee Bradley Baker Isabella Garcia-Shapiro (voice) Alyson Stoner Heinz Doofenshmirtz (voice) Dan Povenmire Francis Monogram (voice) Jeff 'Swampy' Marsh Episodes List Phineas and Ferb Season 3 :Episode 1 The Great Indoors The Great Indoors 2011-03-04 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 2 Canderemy Canderemy 2011-03-04 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 3 Run, Candace, Run Run, Candace, Run 2011-03-11 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 4 Last Train to Bustville Last Train to Bustville 2011-03-11 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 5 Phineas' Birthday Clip-o-Rama! Phineas' Birthday Clip-o-Rama! 2011-04-01 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 6 The Belly of the Beast The Belly of the Beast 2011-04-29 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 7 Moon Farm Moon Farm 2011-04-29 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 8 Ask a Foolish Question Ask a Foolish Question 2011-05-13 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 9 Misperceived Monotreme Misperceived Monotreme 2011-05-13 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 10 Candace Disconnected Candace Disconnected 2011-06-18 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 11 Magic Carpet Ride Magic Carpet Ride 2011-06-18 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 12 Bad Hair Day Bad Hair Day 2011-06-24 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 13 Meatloaf Surprise Meatloaf Surprise 2011-06-24 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 14 Phineas and Ferb Interrupted Phineas and Ferb Interrupted 2011-07-15 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 15 A Real Boy A Real Boy 2011-07-15 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 16 Mommy Can You Hear Me? Mommy Can You Hear Me? 2011-07-29 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 17 Road Trip Road Trip 2011-07-29 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 18 Tour de Ferb Tour de Ferb 2011-08-12 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 19 Skiddley Whiffers Skiddley Whiffers 2011-08-26 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 20 My Fair Goalie My Fair Goalie 2011-09-09 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 21 Bullseye! Bullseye! 2011-09-30 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 22 That's the Spirit That's the Spirit 2011-10-07 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 23 The Curse of Candace The Curse of Candace 2011-10-07 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 24 Escape From Phineas Tower Escape From Phineas Tower 2011-10-21 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 25 Lotsa Latkes Lotsa Latkes 2011-11-18 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 26 Ferb Latin Ferb Latin 2011-11-25 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 27 A Phineas and Ferb Family Christmas A Phineas and Ferb Family Christmas 2011-12-02 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 28 Tri-Stone Area Tri-Stone Area 2012-01-13 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 29 Doof Dynasty Doof Dynasty 2012-01-14 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 30 Excaliferb Excaliferb 2012-01-15 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 31 Phineas and Ferb and the Temple of Juatchadoon Phineas and Ferb and the Temple of Juatchadoon 2012-01-20 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 32 Monster from the Id Monster from the Id 2012-02-10 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 33 Gi-Ants Gi-Ants 2012-02-10 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 34 The Remains of the Platypus The Remains of the Platypus 2012-02-24 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 35 Mom's In The House Mom's In The House 2012-03-02 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 36 Perry the Actorpus Perry the Actorpus 2012-03-03 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 37 Let's Bounce Let's Bounce 2012-03-16 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 38 Bully Bromance Break Up Bully Bromance Break Up 2012-03-16 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 39 Quietest Day Ever Quietest Day Ever 2012-03-30 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 40 The Doonkelberry Imperative The Doonkelberry Imperative 2012-03-30 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 41 Meapless in Seattle Meapless in Seattle 2012-04-06 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 42 Delivery of Destiny Delivery of Destiny 2012-04-27 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 43 Buford Confidential Buford Confidential 2012-04-27 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 44 The Mom Attractor The Mom Attractor 2012-05-04 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 45 Cranius Maximus Cranius Maximus 2012-05-04 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 46 Agent Doof Agent Doof 2012-05-11 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 47 Minor Monogram Minor Monogram 2012-05-11 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 48 What A Croc! What A Croc! 2012-06-01 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 49 Sleepwalk Surprise Sleepwalk Surprise 2012-06-08 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 50 Sci-Fi Pie Fly Sci-Fi Pie Fly 2012-06-08 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 51 Sipping with the Enemy Sipping with the Enemy 2012-06-22 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 52 Tri-State Treasure: Boot of Secrets Tri-State Treasure: Boot of Secrets 2012-06-22 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 53 Doofapus Doofapus 2012-07-06 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 54 Norm Unleashed Norm Unleashed 2012-07-20 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 55 Where's Perry (1) Where's Perry (1) 2012-07-26 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 56 Where's Perry (2) Where's Perry (2) 2012-08-24 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 57 Ferb TV Ferb TV 2012-09-07 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 58 When Worlds Collide When Worlds Collide 2012-09-14 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 59 What'd I Miss? What'd I Miss? 2012-09-17 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 60 Road to Danville Road to Danville 2012-10-26 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 61 This is Your Backstory This is Your Backstory 2012-11-02 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,... Phineas and Ferb Season 3 :Episode 62 Blackout Blackout 2012-11-30 Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace,...