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Walking Dead's Ritchie Coster stars in CBS series Watson coming in 2025

The series is described as a medical drama with detective elements.

By Renee Hansen

"After Yang" New York Screening
"After Yang" New York Screening / Dominik Bindl/GettyImages
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Actor Ritchie Coster will star in the new CBS series Watson, a medical drama based on Dr. John Watson, the partner of Sherlock Holmes, made famous by Arthur Conan Doyle's novels. Set in the present day, the series draws inspiration from Doyle's stories set in the late 1800s.

The thirteen-part series, created by Craig Sweeny (Limitless), will premiere on CBS on Jan. 26, 2025, after the AFC Championship Game and stream on Paramount+. Regular episodes will begin airing on Feb. 16. Sweeny wrote the premiere episode and serves as showrunner. Chestnut executive produces, and Larry Teng directed the first two episodes.

WATSON
WATSON takes place seven months after the death of the titular character’s friend and partner Sherlock Holmes at the hands of Moriarty. / CBS

Watson picks up six months after Sherlock Holmes had been killed by his archenemy, Moriarty. Dr. Watson has resumed his medical career running a rare disorders clinic, but his old life will rear its head once again. This time, Watson will use his detective skills to investigate medical mysteries in a modern-day setting. When Moriarty returns, Watson is forced to face his past.

Morris Chestnut portrays Watson, and Rochelle Aytes plays Mary, Watson's ex-wife, the clinic's medical director. Coster plays Shinwell Johnson, a former criminal who works at the clinic in the administrative department; in Doyle's stories, Johnson served as an informant for Sherlock and Watson. Additional cast includes Eve Harlow, Peter Mark Kendall, Inga Schlingmann, and Rochelle Aytes.

Check out the trailer for Watson below and don't miss the premiere on CBS and Paramount+ Jan. 26.

Ritchie Coster

Coster joined The Walking Dead universe in the final season of the series as Pope, leader of the Reapers. Recently, he has appeared in several notable titles, including Tulsa King, Florida Man, and Rumble in the Dark. He is well known for his roles in Happy!, The Dark Knight, The Bounty Hunter, Let Me In, and Blackhat.

He will also appear in John Swab's action thriller, King Ivory which stars James Badge Dale, Ben Foster, Michael Mando, Rory Cochrane, George Carroll, Graham Greene, and Melissa Leo. The move used extensive research with law enforcement, gangs, inmates, migrants, and addicts, to create an exposé on fentanyl trafficking and its effect on anyone touched by the crisis.

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