The CSIs wait by the bedside of one of their own when he's shot in the line of duty. One CSI faces a hard choice by having the power of attorney over their injured friend and colleague. Meanwhile, the team also investigates the strange way of life of one man when he is found decapitated by a train.

Tonights guests include Rebecca Romijn from "X-Men 3: The Last Stand" and The Eagles of Death Metal.

Stephen Colbert welcomes the Assistant Curator and Chair, Vertebrate Zoology at the Center for Systematic Biology & Evolution, Ted Daeschler!

Monologue/Opening: Graig gets a little goofy tonight due to his case of bird flu. He mentions that former Beatle Paul McCartney has just filed for divorce from his wife of four years, Heather Mills. Later, he welcomes "Speech Expert" Henry Winkler for a little advice on giving speeches in college. Thursday's Guests: Dominic Monaghan ("Lost") talks backstage gossip about his hit drama. Diane Farr and Phil vassar performs.