It might be a silly week to talk about the other "Star" franchise, but actor Michael Dorn has appeared in more Star Trek episodes as the same character than any other actor; playing Worf, son of Mogh of the Klingon House of Martok on both The Next Generation and Deep Space Nine.
The Seth McFarlane movie Ted 2 is out on DVD, BluRay, and for digital download this week and in it Michael Dorn has a memorable role as the lover of Patrick Warburton's character, both of whom cosplay at New York Comic-Con as the real-life geek properties they’re best known for -- The Tick and Worf.
*"Star Trek: The Next Generation: Sins of the Father (#3.17)" (1990)
[Worf has shown a strong reaction to Kurn's offense]
Kurn: So, your blood is not so thin after all.
Lieutenant Worf: I am a Klingon! If you doubt it, a demonstration can be arranged.