Mark Harmon's Return to NCIS Confirmed for 2025
Mark Harmon is officially returning to NCIS as Special Agent Leroy Jethro Gibbs for the 2025 season. CBS and production company Belisarius Productions confirmed his involvement in the upcoming season, which continues the franchise's long-running run since 2003. The announcement follows months of speculation about Harmon's status after his previous departure from the lead role. The return aligns with NCIS's strategy to retain its original lead character while integrating new cast members and story arcs. This move is expected to influence ratings and streaming performance for the series in the current television landscape. For broader context on long-running TV franchises maintaining legacy leads, see this overview on long-running TV franchises and their impact on network ratings. Read more about TV franchise strategies.
Harmon's return is tied to a structured production schedule for the 2025 season. Filming for NCIS Season 23 is underway at Paramount Studios and on location in and around Los Angeles. The season is expected to premiere in fall 2025, with CBS and global distribution partners handling broadcast and streaming windows. Production timelines are coordinated with the broader CBS entertainment slate, which includes spin-offs and limited series within the NCIS universe. The 2025 season will also feature updated opening sequences and theme arrangements reflecting the show's continued evolution. These production details are consistent with standard industry practices for procedural dramas with long production cycles.
NCIS 2025 Cast and Character Changes
Alongside Mark Harmon's return, NCIS 2025 introduces several cast adjustments. New series regulars include agents and technical specialists added to the Major Case Response Team, while some recurring characters from prior seasons are being phased out. The showrunners are focusing on a generational shift in the team dynamics without removing Gibbs from the central narrative. This casting strategy aims to balance legacy appeal with fresh on-screen chemistry. The casting process follows standard studio and network approval workflows, with final decisions influenced by test audience feedback and internal story breakdowns. For more on how major TV casts evolve across seasons, see this analysis of TV cast evolution and audience retention. Read more about TV cast changes.
The character of Leroy Jethro Gibbs will retain his core investigative role, with storylines addressing his ongoing mentorship of younger agents. Harmon's involvement extends to key episodes that anchor the seasonal mystery arc, which in 2025 centers on a multi-agency terrorism plot. Supporting characters from NCIS: Hawaiʻi and NCIS: Sydney are expected to cross over in limited arcs, expanding the franchise's shared universe. These crossovers are coordinated between CBS Studios and the respective production teams for each NCIS series. The approach mirrors recent franchise television models that use interconnected storylines to boost viewership across multiple shows.
Production and Broadcast Details for NCIS 2025
NCIS Season 23 is produced by Belisarius Productions and CBS Studios, with Mark Harmon serving as executive producer on select episodes. The season is being filmed with a standard procedural drama workflow, including staged interrogation scenes, field ops sequences, and laboratory segments. Post-production is handled at facilities in Los Angeles, with editing and visual effects aligned to CBS broadcast standards. The 2025 season will air on CBS in the United States and stream on Paramount+ in the U.S. and select international markets. Distribution agreements include linear television and digital