On Halloween, Doc's dad gives her a toy pumpkin with a ghost that pops out. The ghost, whose name is Sebastian, is scared of Halloween, until Doc and her friends teach him that it's all just make-believe and there's nothing to be scared of.
Season One:Ba-Ba Bubbles • Bop, Bop, Bop (Don't Wanna Pop) • Pop Up • Get Your Sleep On • Close Your Eyes • Be Safe • Water, Water • Everyone Gets Hurt Sometimes • Be Good to Your Tummy • Rockin' the Right Note • Nobody Wants a Broken Toy • Stars, Stars • We're Ben-Anna • You Can Do It • If You Got the Hiccups • Dig, Dig, Dig • When You Need a Friend • Do What the Doctor Says • Ready for Action • In a Flash • Rest Your Rotors, Ronda • Keep Still • Nobody's Perfect (Forgive and Forget) • Here For You • We Can Light the Night • Have You Heard • Blast in a Cast • Eat Good Food • Camping's Great • You're Gonna Grow • A Lambie Like You • My Better Half • The Things You Like • Tell The Doc • It's Your Birthday (Happy Birthday Hallie) • My Shark's Tale • Stick With Me • Because You're You • Everybody in the Pool • Loud, Loud Louie • Wash Your Hands • Clap, Clap, A-OK • Take Care • Made in the Shade • On Halloween • Let's Play Outside • Chillin' in the Snow • Look Great in Glasses • Shine • Blue Skies • Dinosaur Stomp • Brush Your Teeth Season Two:The Doc Mobile • No Matter What • I'm So Strong • Let the Good Times In • A Little Help • Twisted Tail Blues • Wing Deep • Stuffy the Great • Be You • Take Care of Yourself • A Little Sun • What Friends Do • Stay Calm • My Helmet • Keep On Dancin' • Room to Zoom • Why Does It Have to Be You? • Blow, Blow, Blow Your Nose • Your Body Feels Great (When It's In Shape) • Itchy • What's Better Than Toys? • A Very McStuffins Christmas Time • I Shake-a-My Hair • Beat the Heat • Picture You • Her Spots Are So Spot On • Hallie Hippo Happy Hour • Peachy Clean • The Rest is Up to You • Be a Patient Patient • The No-Tangle Tango • Stay Cool in an Emergency • A New Way to Be Wild • There's So Much to Adore About You • I Love My Hairdo • Hey, Star Blazer Zero • Weather the Storm • Fix It Now • Forever Friends • Three Cheers for Chilly • A Princess Can Too • Treat It Like a Treat • We're On the Same Team • Here We Go • Everyone (Look What I Can Do) • Don't Eat a Little Toy King • One Toy at a Time • Backyard Rules • Wash Your Face • He's a Monster • Be a Doctor Too • Don't Worry, We'll Wait • So Much to Say • Love What You Do • Before You Sleep • Fess Up • Ready to Serve • Look Before You Leap • Just Say Hi • Stop • Smiling's Good for You • Get the Spaces In Between • I Can't Cuddle • Bonk Your Noggin • Eyes on the Road • The Right Shoes • Get Your Eyes Checked Out • Give It a Try • Be Brave • Sunscreen • The Show Doesn't Have to Go On • Your Animal Friends • Directing Melinda (In a Ballet in a Pool) Season Three:Teddy B Blues • Walk, Don't Run • Brave Queen Bessie • Step Out • Wait for It • Chew Your Food • It Was Only a Dream • Suddenly Somebody Else • A Toy to Love • I Want to Adopt You • Get Ready • Pick Me • Everyday • She's the Boss • Even the Brave • Pop, Pop, Pop (Did I Getcha?) • School Is Awesome • Glitter Can Happen • The First Lady and Me • Breathe Easy • Safe 'N Spooky Time • Sad Stuck Gator • The Magic Is Me • I'll Wait for You • Squibbles, Come Home • One of a Kind • Out of Sight • Queen of Ballet • My Style • Out with the Old • Talk to Kids • Use Your Imagination • Not Cool to Get Too Cold • Take a Break for the Team • A Part of Me • What's Best for Your Pet • Trophy of Dreams • Can't Stop the Giggles • The Unknown • Bust a Marvelous Move • The Best Big Sister • The Giving Is Good • Green As a Four Leaf Clover • Any Size at All • Plenty of Love (to Go Around) • Bike Rules • Babies are the Best • No Longer King • The Baby's Comin' • The Things We Can Do • Love That Little Baby • Home • Suited Up for Safety • Focus • New Haircut • Slow Down, Sleep Now • I'm Gonna Win • Putting the Awe in Awesome Season Four:Welcome to the Hospital • King of the Broken Toys • Never Stop Loving a Toy • So Proud to Be Med Students •I Know What's Best • Get Psyched to Work All Night • There's an Appointment for That • Your Signature Style • Ride, Ride the Ambulance • Without You • Stay on the Line • Baby Bathtime • Help Us Help You • Too Far • Rest Your Voice • The Big Foosball Game • Making a Diagnosis • Stuck Here Blues • The Emergency Room • Buddy Up • Bye Bye Bouncy Boo-Boos • Therapy Pet • It Matters What You Say, Mr. Mayor • A Monster! • Safely Across the Street • Get You to the Party On Time • Where You Should Be • Get a Better Picture of You • Follow That Bear! • Think Heavy Thoughts • Me and My Guide • Think Like Your Pets Think • Make You Better • Doc's Gonna Figure It Out • Brave Like You • If You Wanna Say Hi • I'm So Great at My Job • Better Bedtime Steps • Not the Bedtime Blues • Not for Touching • Ready for You • Oh No! We're Baby Toys • In Case of an Emergency • Who Needs a Doc When You've Got a Duck • The Hero Inside • First Responders Respond! • We'll Put It Back Together •What a Mermaid Can Do • Hula No More • Make the Right Call • Just Bring You • Meant to Be Wild • Tonight is Going to Be Perfect • A McStuffinsville for All • Remember Your Numbers Season Five:We're the Pet Rescue Team • The Best Rescuer Ever • Your Perfect Pet • Where'd He Go? • Christmas Is Coming • Christmas Miracle • Rescue in Space • Rocket to the Rescue • The Search for Cece • A Kid Always Knows • When I Get to Dragon Mountain • Love Makes a Family • Good to Be Good • Ask Anything • Helping Toys Is What I Do • You Can Depend on Your Friends • Mumbo and Me • Time to Let You Go • This Could Be My Life • You're Our Star • Lost Toy Lament • Going Home • Everything Bling • Jungle Quest • You Shine • Replaceable • When There's No Snow • Best Medicine • A World Without Doc • Water Wing