Joel Polis

The retired lead detective on Beckett's mother's homicide case is gunned down after telling her he has new information; Castle and Beckett's partnership grows stronger.

A cabin burns down in the woods revealing two bodies – one of a modern-day witch and one from the days of the Salem Witch Trials – leading Booth and Brennan into the world of Wicca to find a killer. Meanwhile, when Hodgins’ reckless driving gets him and Angela arrested and thrown in jail, Sweets and intern Clark Edison (guest star Eugene Byrn) step into unfamiliar territory to help out the team.

An industrial but pre-warp planet's dangerous polaron technology seems to be the cause of a planet-wide wipeout discovered by the Voyager crew -- or did the visitors actually cause the problem in the near past?

Following a leak of classified information, the Secretary of the Navy partners NCIS with PsyOps to solve the mysterious case.

The Cheers gang challenges a rival bar to a bowling tournament.