Mekhi Phifer speaks at Starz "Torchwood" Panel during Comic-Con 2011 on July 22, 2011 in San Diego

*Mekhi Phifer and Cheech Marin will guest-star in an episode of the USA comedy Psych, TVGuide.com reports.

Phifer, who currently stars as a not-so-dead dead man on “Torchwood: Miracle Day,” will play Drake, a member of “Blackapella,” the a cappella group Gus (Dulé Hill) belonged to in college. Drake comes to town to honor Deacon Jones (Cheech Marin), his mentor from childhood. But the deacon is shot while receiving the honor at the local community center, and the group steps in to help Shawn (James Roday) and Gus investigate.

Jaleel White and Kristy Swanson will reprise their roles as Tony and Marlowe, respectively, in the episode.

Psych returns for its sixth season on Wednesday, Oct. 12 at 10/9c on USA.