“Tsunkatse” (February 9, 2000) may be one of the most shameful episodes of “Star Trek: Voyager,” which is saying something. While on shore leave, several Voyager officers discover a nearby mixed martial arts tournament called Tsunkatse. Shortly after, they are kidnapped by a slimy character named Penk (Jeffrey Combs). Tuvok (Tim Russ) is injured, but Penk denies him treatment unless Seven of Nine fights in a Tsunkatse tournament. This is the same plot as any number of obscure martial arts pictures from the 1980s.

Naturally, Seven will have to fight the champion Tsunkatse, a character played by Dwayne Johnson when he was known simply as The Rock. Before “Voyager,” Johnson had only a small part in an episode of “That '70s Show” and the short-lived TV version of “The Net.” In “Voyager,” he was essentially asked to play himself, complete with a wrestling ring, flashing lights and a rock music entrance. His character had no name, although his species was mentioned as Pendari, a species known for having a temper. His only dialogue is kayfabe with “Star Trek” inflection. “You’re no bigger than a Tarkan rat,” he says.

“Tsunkatse” is a pretty laughable episode, notable only for its cameo. If you've ever wanted to see the intellectual, diplomatic world of “Star Trek” overlap with the sweaty, demonstrative world of professional wrestling, then this is the episode for you. You are also one of maybe six people in the world.