The voice of Homer Simpson got to appear on an episode of Stargate SG-1, a show that frequently referenced The Simpsons.

Christopher Judge as Teal'c, Amanda Tapping as Maj. Samantha Carter, Richard Dean Anderson as Colonel Jack O'Neill, and Michael Shanks as Dr. Daniel Jackson in Stargate SG-1 Season 7.

Stargate SG-1 was in its eighth season when Black came aboard for a fun (and even funny) face-off against Dr. Daniel Jackson (Michael Shanks) as Vala Mal Doran in the episode “Prometheus Unbound.” ...

Why Michael Shanks let Daniel’s beard grow out on Stargate SG-1 Dr. Daniel Jackson (Michael Shanks) holds Vala Mal Doran's (Claudia Black) face in Stargate SG-1 Episode 901.