Star Trek & Stargate: CHRISTOPHER HEYERDAHL

This guy. One of the few that have been with the Stargate franchise A LOT MORE than Star Trek. Heyerdahl played a human (however briefly) in the first season of Stargate: Atlantis. He would go on to play \"Todd\" the Wraith in I think 21 more episodes - something like that. That includes the penultimate episode that was styled after the NCIS series (Las Vegas).  Many...many... years later... he would show up on Star Trek: Discovery in the third season episode People of Earth.