Bryce McBratnie

Sheldon and Dr Sturgis have their first argument when Dr Sturgis marks an answer wrong on Sheldon's test; Mary fills in for Pastor Jeff when he falls ill.

The lead suspect in a murder investigation is a woman that Gibbs' friend, Phillip Brooks, met on a dating site; Sloane has a secret admirer on Valentine's Day.

The team goes up against the Mob when a former boss is killed, while Junior's friend is on the run after witnessing the murder.

The team land a big case involving a Syrian terrorist after the Undersecretary of Defence takes over from Hetty and Granger.

The parents are asked to form carpools when the bus drivers go on strike, and Axl studies astronomy to impress a girl.