Arizona tests Alex on Grey's Anatomy, and Andy and Erin get musical this week on The Office! Maybe guest star Kathy Bates will join in on the fun! Thursday, February 4 8:00 pm Bones, Fox (1 hr) NEW Brennan and Booth study the atypical remains of a former sanitarium patient, while intern Arastoo Vaziri uncovers a secret from his past. Also features bisexual forensic artist, Angela. 8:00 pm The Vampire Diaries, The CW (1 hr) NEW Bonnie and Ben go on a disastrous date, and Elena helps Stefan and Damon find a missing journal after the boys have a flashback explaining the distance between their father and Pearl. Created by out executive producer, Kevin Williamson. 9:00 pm The Office, NBC (1 hr) NEW A company named Sabre led by an eccentric CEO (guest star Kathy Bates) buys out Dunder Mifflin, and Andy and Erin write a song to welcome her. Pam and Jim discover they’ve been accepted into a prestigious day care center. Features out accountant, Oscar Martinez. 9:00 pm Grey’s Anatomy, ABC (1 hr) NEW Derek starts his new role as interim chief only to discover a huge upcoming lawsuit when Bailey and Meredith’s patient wakes up on the operating table. Meanwhile, Arizona gives Alex a shot in pediatrics, and Mark won’t talk to Lexie. 10:00 pm Project Runway, Lifetime (1 hr) NEW The designers’ egos clash as the competition heats up. Will out designers Ben, Jay, Jesus, and Jonathan crumble under the pressure? 10:30 pm The Sarah Silverman Program, Comedy Central (30 min) SEASON PREMIERE Laura tries to convince Sarah that she was born with ambiguous genitalia, while gay couple Brian and Steve are haunted by a ghost.