Watch NCIS: Season 8, Episode 22

"Baltimore"

When Tony's ex-partner from Baltimore P.D. appears to be the latest victim of the Port-to-port killer, Tony revisits his past as a detective at Baltimore P.D. and the first time he met Gibbs.

Watch NCIS: Season 8, Episode 21

"Dead Reflection"

The Major Case Response Team investigates a murder in the Pentagon that was caught on camera. Complications arise when the killer himself is found dead in an apparent car accident, but Ducky claims it was impossible for him to have committed the murder that was caught on tape as he died two days earlier; eventually the team discovers the real killer was using an advanced silicone mask to impersonate the deceased so he could tamper with evidence implicating him in a botched special forces mission. Also, after trying to figure out the mystery of the eye from "Two-Faced", E.J. and Palmer discover that the eye from the previous episode can open MTAC when scanned.

Recurring characters: Brian Dietzen as Jimmy Palmer and Sarah Jane Morris as NCIS Special Agent E.J. Barrett

Watch NCIS: Season 8, Episode 20

"Two-Faced"

The murder of seaman bearing the hallmarks of the notorious "Port to Port" serial killer results in Director Vance creating a task force comprising Agent Gibbs' MCRT and Agent Barrett's team, with Agent Barrett being designated as lead investigator. Gibbs also suspects Barrett of sleeping with DiNozzo and the team gets to meet Ziva's boyfriend Ray, who turns out to be a secret CIA liaison to NCIS.

Recurring characters: Brian Dietzen as Jimmy Palmer and Sarah Jane Morris as NCIS Special Agent E.J. Barrett

Watch NCIS: Season 8, Episode 19

"Tell-All"

A dying message from a naval officer attached to the Defense Intelligence Agency leads Gibbs' team in search of a manuscript containing military information.

Recurring characters: Brian Dietzen as Jimmy Palmer and Joe Spano as FBI Agent Fornell.