People on Smallville who have been on Stargate.

[Teal'c_PI]

In this past season--which one was it, anyway?--I saw Tim Guinee, AKA Tomin, AKA Vala's husband. He was in the shadows half the time, but I recognized him by his voice.

[welshgater]

Cool hehe
I saw Katharine Isabelle/Valencia from Camelot in 3x04 Slumber
& I also noticed Tamlyn Tomita/Shen Xiaoyi , small part, she's in a limo, season 3 again I think.

[MissCheerfully]

Love the episode where Erica plays with Teal'c! ^^
and I've notices that Gabe Sullivan in Smallville appears sometimes in SG1 ^^

[jwgrlrrajn]

You can add Julian Sands, Michael Shanks and Brent Stait to the list now. (well, the last two won't show up for a little while yet)

Julian Sands = Middle-aged Jor-El

Michael Shanks = Hawkman

Brent Stait = Dr. Fate

[Replicator Todd]

You can add Julian Sands, Michael Shanks and Brent Stait to the list now. (well, the last two won't show up for a little while yet)

Julian Sands = Middle-aged Jor-El

Michael Shanks = Hawkman

Brent Stait = Dr. Fate

Julian Sands was pretty sweet! Can't wait for Michael.

[Ancient Scientist1]

Guys, you're forgetting JR Bourne (season 9). If I am wrong correct me, but he was in the episode where Lois was captured (when is she not getting caught!). This guy, played by JR Bourne, suspected there have been aliens (the Kadorians) living on earth, so he also captured some of them as well.

So you can add him to the list.

[Starsaber]

Lex hallucinated a character played by Ryan Robbins (Laydon on SGA) in Season 3.

[kimberlyrose]

Steve Makaj (Col. Makepeace) was a college football coach trying to recruit Clark in an early episode, and played a contractor in a recent episode.