FOX's sitcom That '70s Show had a successful run of eight seasons and 200 episodes. The final episode was emotional for the cast, especially Laura Prepon and Mila Kunis who struggled to say goodbye. Wilmer Valderrama, on the other hand, saw it as an opportunity to move on. Topher Grace made a return for the final episode, dispelling rumors of a rocky relationship with the cast. Valderrama initially hesitated to reprise his role for the reboot That '90s Show, but ultimately accepted and was emotional on his first day of filming.