Patrick Stewart ("Jean-Luc Picard") will guest star on the long-running NBC sitcom Frasier on Tuesday, September 30. According to a press release, the episode is entitled "The Doctor is Out" and has Stewart portraying Alistair Braithwaite, head of the Seattle Opera Guild and acclaimed opera director.

In the episode, Frasier (Kelsey Grammer) is outed as gay on his radio show, thanks to a series of misunderstandings. A chance encounter shortly thereafter has him meeting Alistair, and the two strike up a friendship. Alistair comforts Frasier, having been in a similar situation himself. Frasier is impressed with Alistair, and the two continue to become close friends — even though Alistair's feelings for Frasier are more than friendly. Frasier airs Tuesdays at 9 p.m. ET/PT (check your local listings).

This episode marks a reunion of sorts for Stewart and Frasier star Grammer, who guested as "Captain Morgan Bateson" on the Star Trek: The Next Generation episode "Cause and Effect."