Jason Alexander has appeared on Star Trek twice — a 1999 guest-starring role as a cerebral alien strategist and a recurring ...

For nearly six decades, Star Trek has enjoyed a vast number of memorable guest performances. However, given the franchise's length and the sheer quantity of episodes and one-off characters, it's easy ...

Though its status may still be a mystery, Sam Rockwell has a unique idea for who could replace Alan Rickman in a Galaxy Questsequel series. The original film was primarily led by Tim Allen, Sigourney ...

From The Rock and Kelsey Grammer to Iggy Pop and Joan Collins, these unexpected guest spots prove 'Star Trek' has always ...