Other than the "long legged blonde in a red dress" quote, I think when James Callis first sees the hallucination of Beverly's dad in his army uniform (forgot his name) he says "hey doc!" This could be a reference to Battlestar Galactica. I could be wrong though.
Other than that, great episode. I was not a fan of a lot of the third season (especially the last two episodes) but so far season 4 is pretty awesome. I'm glad I didn't give up watching this show.