10 Best Community Characters Who Only Appeared In One Episode
4. Mr. Rad
Community is known for its parodies, and one of the show's best shots was at its school-set TV comedy rival, Glee. The episode Regional Holiday Music sees the study group fill in for Greendale's Glee club, all at the persuasion of Corey "Mr. Rad" Radison.
Played by Taran Killam, this Will Schuester parody is equal parts charismatic and creepy. He sings the first of many songs in the episode with Abed, which persuades Abed, and the audience, that maybe joining Glee club isn't that bad of an idea after all. After that, the study group dominos fall one by one, and before long, they've all joined the Glee club.
However, when Abed realizes that Glee is a trap, he sabotages their performance by having the vocally incompetent Britta fill in for his part. When she ruins the Christmas pageant, Mr. Rad freaks out at her, and accidentally reveals that he killed a past Glee club. After this revelation, he runs away, never to be seen again.
Though his time on the show was brief, Mr. Rad gives Community one of its best songs ever and kickstarts one of Season 3's funniest episodes.