Stargate SG-1 S10E8 “Memento Mori”
This is a joke about how there are a lot of actors who portray characters in both Stargate SG-1 and the X-Files (just like basically every other sci-fi show filmed in Canada). Carter, Hammond, Dr. Lee, etc. I found out recently that IMDb has a neat advanced search function that allows you to compare two shows to quickly see which actors appear in both: https://www.imdb.com/search/name/?roles=tt0106179%2Ctt0118480
The actual dialog in that scene:
Sal, what am I doing? Working here, sleeping out the back, watching reruns of the X-Files in my spare time. I appreciate everything you’ve done for me, but… I’ve gotta tell you, I’ve been thinking about leaving.
Bonus: A remastered version of an old meme that is another Vala meta crossover

Stargate SG-1 S9E5 “The Powers that Be”


Don’t give Vala Farscape. She’d lose her mind all over again.
That one episode of SG1 that had them dress up as Farscape characters while they are describing obscure things was great