Ryan Doom

When Castle and Beckett investigate the murder of a man with human bite marks on his body, Castle's wild theories start flying.

The family baby-proofs the house as Hope learns to crawl; Jimmy frequently visits the grocery store in hopes of seeing Sabrina.

Jimmy asks Sabrina's cousin to babysit Hope so he can return to work; Burt tries to persuade Virginia to quit smoking.

When Sabrina's boyfriend can't make it to a Halloween party, Jimmy offers to put on his costume and go in his place; Virginia takes Maw Maw, dressed as a cat, trick or treating.

A 13-year-old's interest in Sabrina drives Jimmy crazy; Burt and Virginia consider what retrieving Maw Maw's swallowed gold tooth will entail.

Maw Maw falls for a man she meets at Shelley's day care; Sabrina thinks her college boyfriend is cheating on her.