Question: Could it be that Sara is pregnant with Grissom's child on CSI?

Answer: Um, no. Speaking of CSI, anyone wanna hear my big news about who's stepping in for the exiting Bill Petersen? It's Liev Schreiber! The film/stage vet will debut in January when Grissom decides to step away from blood and guts and (temporarily) take up teaching. So, for the near future, that's Professor Grissom to you.