John Lavelle

NCIS connect a message in blood left by a murdered Navy commander to a manuscript that may contain classified military information.

Grover's parents and brother arrive in Oahu to spend Thanksgiving together; a thief is accidentally crushed to death by an empty safe.

When robbers strike a diamond exchange and take hostages, the team thinks the culprits are copying a convict's criminal strategies.

The death of Karl Haas has Henry and Jo looking for a killer and working to solve a decades-old art crime; Abe receives a surprise visitor and a priceless gift.

Tommy involves himself in Jimmy and Kevin's bookmaking scheme when he realises the guy about to get busted is his friend Maxwell (guest star John Lavelle); Jenny learns about her father's (guest star Kevin Conway) medical condition when the diner receipts go missing.