SPOILER ALERT: The story includes a few details about the Season 2 finale of CBS’ Watson.
Watson and Sherlock’s fates intertwined one last time in the Season 2 finale of Watson, which serves as a series finale as the CBS medical drama has been canceled.
In the finale, as Watson (Morris Chestnut) traveled with Mary (Rochelle Aytes) to Baltimore to get surgery for the glioblastoma that had been causing his Sherlock Holmes visions all season, a disoriented Holmes — in the flesh — was admitted to the Holmes Clinic in Pittsburgh. When Watson got word, he abandoned his surgery plans and returned to treat his friend. He deducted the cause of Sherlock’s illness but the delay of his own life-saving surgery cost him, and Watson suffered a debilitating seizure.
He eventually woke up and professed his love to Mary who reciprocated. With his surgeon coming to Pittsburgh, the finale ended with Watson in the OR and a vision of him and Mary living at 221B Baker Street in London, the future he had laid out for them in their heart-to-heart hours earlier.
Speaking to Deadline, Watson creator/executive producer Craig Sweeny addressed how he approached the finale and its ending and provided one explanation for the Baker Street flashforward.
“The season finale was tricky to write in that, even while we were filming it, we didn’t know if the show was coming back or not,” he said.
CBS’ cancellation decision came after Watson had wrapped production on Season 2.
“We opted to treat it mostly as a season finale, with a coda appended that nods to a possible future for Watson and Mary,” Sweeny added. “The coda, set at Baker Street, has several possible interpretations — among other things, it could be a fantasia Watson is seeing as he’s on the operating table in what may be his dying moments. I have my own interpretation but prefer not to comment on it beyond what’s on the screen so audiences can make up their own minds.”
At the time of the Watson January 2025 series premiere, Sweeny told Deadline that he had built the show on the presumption that Sherlock is dead. “I don’t want to be held to that if there’s some great story that presents itself, but I don’t believe that we’re ever going to feature Sherlock as an ongoing character in the show Watson at this time,” Sweeny said back then.
Following the Season 2 finale, Sweeny explained to Deadline how the idea of bringing Sherlock onto the show started and evolved — the famous detective spent most of the season as what all assumed was a hallucination stemming from Watson’s brain tumor — and what the Season 3 plan for the Watson/Sherlock storyline was.
“In Season 3, Watson would also have been Sherlock’s doctor treating ongoing complications from the ailment that plagued Holmes at the end of Season 2,” Sweeny said. “We originally conceived the Watson/Holmes storyline to have Holmes exist only as a delusion in Watson’s head as a means for Watson to learn about his glioblastoma, but quickly revised those plans after we saw what Robert Carlyle brought to the role of Sherlock Holmes. Watson’s Holmes and Watson were fun to write and watch, and so we devised a way for Sherlock to be present in the real world.”
‘Watson’ (L-R): Robert Carlyle as Sherlock Holmes, Morris Chestnut as John Watson
The Season 2 finale of Watson left storylines open-ended for the young doctors too, including the ongoing investigation into Beck’s death, the search for Sasha’s birth mother and Sasha (Inga Schlingmann) breaking up with Stephens (Peter Mark Kendall). Season 3 would’ve wrapped their fellowship arcs.
“The heart of Watson was the cases, so if we had come back we would have continued to hunt the strange and amazing scientific outliers that made up our strongest episodes,” Sweeny said. “Of course, medical fellowships last three years, so a major theme of season three would have been exploring what would have happened to Ingrid, Stephens, Adam, and Sasha at the end of their Fellowships and how many new doctors would be worked into the mix.”
Sweeny took the opportunity of the Watson finale to reflect on the series’ two-season run.
“We had a lot more to say with the show, so of course it’s sad we won’t be making any more,” he said. “But I’m grateful that we got to write and produce 33 episodes. I love to write procedurals with cases that are set at the edge of what humans know, and Watson gave me and our team the chance to do that every week.”
Sweeny previously spent five years on CBS’ Sherlock Holmes/Dr. Watson procedural Elementary, most of them as executive producer. He went on to acknowledge Watson executive producer Dr. Shäron Moalem, who “shared insights from decades working in genetics and was singularly important in crafting cases set on the vanguard of what’s possible.”
‘Watson’ cast
CBS
Sweeny also praised the work environment on Watson and its No.1 on the Call Sheet.
“Making Watson for two seasons was a rewarding experience for the producers, cast, and crew. We had tight-knit communities in Los Angeles and Vancouver,” he said of the series, which was written in Los Angeles and filmed in Vancouver. “I’ve been blessed to have career highlights and happy experiences on shows, but I’ve never known anything quite like the warm and collegial vibe that prevailed on Watson. I’m especially grateful to Morris Chestnut for his role in making that happen. When Morris was considering the role, we met for coffee and talked about the environment we both hoped to foster. His tireless leadership and example helped make the Watson set a happy experience for everyone who worked there.”
As he closes (prematurely) the chapter on Watson, Sweeny chooses to focus on the positive.
While thanking the “special group of people” who worked on the series, his producing partners, the cast, the writing staff, the casting and post departments, he said, “Naturally, all of us mourn the loss of the show and the community around it while also being grateful for the opportunity to make as much Watson as we did.”
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