Claire makes an effort to take a new family portrait, but everybody is too busy to cooperate: Gloria and Manny go with Phil and Alex to a Lakers game and share an awkward moment on the jumbotron, Cameron gets a job as a wedding singer while Mitchell takes care of Lilly and a stray pigeon, and Luke interviews Jay for a school project.

Locke carries on with his plan while Jack’s group searches for Desmond.

The NCIS team comes to a surprising discovery while investigating the shocking murder of their own team member.

Chuck still has dreams of Shaw being alive and turns to Morgan for help to keep it a secret from Sarah, but Morgan cannot resist Sarah’s interrogating techniques. Meanwhile, after being contacted by Ellie, Chuck’s father Stephen shows up at the Buy More, not knowing about the Intersect 2.0 in Chuck’s head.

Horatio’s ex-girlfriend is killed in an explosion and the killer may be someone in their own department.

Jack’s mission makes life difficult for President Taylor as she prepares for a signing ceremony. Meanwhile, Chloe leads CTU on a collision course with Jack; and President Logan meets a formidable foe.

Cuddy joins House, his team and a search-and-rescue team to assist at the scene of an emergency in Trenton, N.J., where a crane has collapsed onto a building. Among the victims: the guilt-ridden crane operator and a trapped woman (China Jesusita Shavers) who might lose her leg. Meanwhile, House learns that Cuddy and Lucas plan to move in together.

Ted discovers the date movie he sees with a girl is based on his relationship with Stella.

Michael takes bad news about Donna shockingly well. Jim and Pam’s sleep deprivation from their new baby leaves them exhausted at the office. Angela seeks to force Dwight to honor their pre-natal contract.

To confront “their” William Bell, Walter and Olivia make the trip to the alternate Earth to stop the collision of the two worlds… and the extinction of one.