Star Trek and Stargate are two of the most prolific and beloved science fiction franchises, and it is no surprise that actors would overlap between the two series. Both Star Trek and Stargate had shows running throughout most of the 1990s and early 2000s, and many actors made appearances on both shows. Star Trek and Stargate often borrowed episode titles and even plots from one another. Each Stargate series follows a different team of adventurers as they explore various planets by traveling through a massive Stargate that was discovered in the ruins of Giza.

https://screenrant.com/star-trek-stargate-crossover-actors/