Original air date: 09/20/2016 Runtime: 41:48 min. The NCIS team investigates a deadly car explosion in D.C. that connects to NCIS Special Agent Nicholas "Nick" Torres (Wilmer Valderrama), who disappeared six months ago while on a deep undercover assignment in Argentina. Also, Gibbs asks NCIS Special Agent Alexandra "Alex" Quinn (Jennifer Esposito) to shadow his team after rejecting eight agents she instructed and referred for the open position.
Original air date: 10/04/2016 Runtime: 42:28 min. When the NCIS team investigates a marine sergeant's tragic fall from a building, her doctor, Grace Confalone (Laura San Giacomo), confides in Gibbs and suggests he treat it as a murder investigation. Also, Torres searches for a place to live.
Original air date: 10/11/2016 Runtime: 42:17 min. After the body of a navy lieutenant is discovered aboard a destroyer during a tiger cruise, when civilian guests are allowed to spend the night on the ship, Gibbs, Quinn and Palmer travel out to sea to investigate. Also, McGee contemplates the perfect proposal for Delilah Fielding (Margo Harshman).
Original air date: 10/18/2016 Runtime: 41:28 min. When a missing MI6 Officer is linked to a murdered petty officer, Gibbs sends Quinn and Bishop to Philadelphia to work with MI6 Officer Clayton Reeves (Duane Henry). Also, Quinn painfully recounts the NCIS case that made her leave field work. Tony Gonzalez, former NFL player and studio analyst for "The NFL Today," guest stars as NCIS Special Agent Tony Francis.