Chris absconded to Las Vegas  this week for liquor, gambling, and other licentious pursuits, so it was left to the other two pillars of RFS to hold the fort, which they barely managed. The subject at hand? "Turn Left,' which served as not only this season's "Doctor Lite" episode but also as a fantastic return to the series for Billie Piper, not to mention a sterling performance by Catherine Tate. The usual digressions and drivel-making were of course present, but without our tall co-host's derisive sneers and seething hate, it wasn't quite the same.