"Dead Letter" -- The NCIS team, alongside the FBI and MI6, continue an international manhunt for an escaped British spy who has left one colleague fighting for their life in ICU, on NCIS, Tuesday, May 10 (8:00-9:00 PM, ET/PT), on the CBS Television Network. Sarah Clarke guest stars as FBI Special Agent Tess Monroe and Duane Henry guest stars as MI6 Officer Clayton Reeves. Pictured: Emily Wickersham as Eleanor Bishop, Sean Murray as Timothy McGee, Mark Harmon as Jethro Gibbs, Duane Henry as Clayton Reeves. Photo: Cliff Lipson/CBS ÃÂ©2016 CBS Broadcasting, Inc. All Rights Reserved | Episode 13.23 - Dead Letter | Promotional Episode Photos | Season 13 | ncis | Gallery

SpoilerTV Image Archive | Gallery | ncis | Season 13 | Promotional Episode Photos | Episode 13.23 - Dead Letter | "Dead Letter" -- The NCIS team, alongside the FBI and MI6, continue an international manhunt for an escaped British spy who has left one colleague fighting for their life in ICU, on NCIS, Tuesday, May 10 (8:00-9:00 PM, ET/PT), on the CBS Television Network. Sarah Clarke guest stars as FBI Special Agent Tess Monroe and Duane Henry guest stars as MI6 Officer Clayton Reeves. Pictured: Emily Wickersham as Eleanor Bishop, Sean Murray as Timothy McGee, Mark Harmon as Jethro Gibbs, Duane Henry as Clayton Reeves. Photo: Cliff Lipson/CBS ÃÂ©2016 CBS Broadcasting, Inc. All Rights Reserved

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