James MacDonald

As Castle and Beckett investigate the ritualistic murder of a young woman, they find strange symbols in the victim's apartment; Castle struggles with Alexis' decision to move in with Pi.

The BAU team must delve into Morgan's past to prove his innocence when he is arrested on a charge of murder in Chicago.

Zoe Landau, an attorney for the Department of Justice and Cal's ex-wife, asks for help on an arson investigation that resulted in death. Meanwhile, Gillian, Ria, and Eli help a detective get to the truth behind the murder of a member of a rapper's entourage.

Coulson and the team are trapped with a traitor in their midst without anyone they can trust.

The team begins an undercover stakeout when their lead suspect in an old unsolved case is released from prison.

While taking Nog to Starfleet Academy on Earth, Quark's shuttle malfunctions and crashes in Roswell, N.M., in the year 1947.