I remember thinking the same question quite often. Deluise I recall in the Behind the Scenes videos to be the funny guy on the set, the one thats pulling the jokes on the show. Martin Wood I recall being pretty good too. Wood is one Sanctuary which rocks! IMO all the good people moved to Sanctuarys, actors, writers, and crew. Not to mention Sanctuary gets so many guest stars from SG actors.
I believe his first ep was in season 2.
It would seem that way...Hmm. I must have misunderstood Mr. A's post. I thought he was talking about SG1