"Think Tank" is the 114th episode of the science fiction television series Star Trek: Voyager, the 19th episode of the fifth season. Jason Alexander, made famous in the 1990s from the hit sitcom Seinfeld, which had recently ended its run, guest stars as Kurros. In this episode, Voyager encounters a unique group of aliens, that offer to help solve problems, but for a price.

Jay Scott Greenspan, known professionally as Jason Alexander, is an American actor and comedian. He played George Costanza in the television series Seinfeld from 1989 to 1998, for which he was nominated for seven consecutive Primetime Emmy Awards and four Golden Globe Awards.