So... you're the best Forman. You're Batman
—Eric to Kitty

Prank Day is the 21st episode of Season 4 on FOX comedy That '70s Show.


Kelso makes up a new holiday called prank day and pranks Hyde, Eric and Fez, the guys get back at Kelso for pranking them, but the results are disastrous, even with an unexpected ally on their side. Jackie spends the day with Donna in order to cheer her up.


Topher Grace as Eric Forman
Mila Kunis as Jackie Burkhart
Ashton Kutcher as Michael Kelso
Danny Masterson as Steven Hyde
Laura Prepon as Donna Pinciotti
Wilmer Valderrama as Fez
Debra Jo Rupp as Kitty Forman
Kurtwood Smith as Red Forman
Tommy Chong as Leo


  • Don Stark is absent from the main cast in this episode.