George Takei

Star Trek alum George Takei has joined the cast of Nickelodeon's new live-action series Supah Ninjas, TVGuide.com has learned exclusively.

The half-hour comedy follows three kids who are drafted into a secret world of crime fighting after Mike Fukanaga (Ryan Potter), an average high school student, discovers he is descended from a long line of ninjas. Takei plays Mike's recently deceased grandfather; he appears as an interactive hologram to guide and train the team of "Supah Ninjas" along the way.

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"The grandfather has the serious task of instructing the next generation of ninjas, but he also has a lot of funny moments and I find that a refreshing take on the traditional teacher-student relationship," Takei said.

Carlos Knight co-stars as best friend Owen and Gracie Dzienny is Mike's crush, Amanda.

A preview of Supah Ninjas will air Monday, Jan. 17 at 9/8c.