Watson, starring Morris Chestnut as the titular doctor, has been delivering twists in CBS’ modern take on the classic Sir Arthur Conan Doyle characters from the start. Randall Park as the villain James Moriarty? A great surprise at the end of the premiere. The fact that Moriarty died in the Season 1 finale? Another shock.
The good news is that not only will the series be back for a second season, but it’s returning sooner than previously scheduled. Read on for everything we know about Watson Season 2, from the premiere date to the cast and more. Plus, is the doctor’s friend, sleuth Sherlock Holmes, alive?
When will Watson Season 2 premiere?
While Watson was originally slated to return in the midseason (2026), CBS announced a major change to its fall 2025 lineup on July 11. CIA was moved to the midseason, with the Watson Season 2 premiere moved up to Monday, October 13, at 10/9c.
Who’s in the Watson Season 2 cast?
Watson stars Morris Chestnut (as Dr. John Watson), Eve Harlow (as Ingrid Derian), Peter Mark Kendall (as twins Dr. Stephens Croft and Dr. Adam Croft), Ritchie Coster (as Shinwell Johnson), Inga Schlingmann (as Sasha Lubbock), and Rochelle Aytes (as Dr. Mary Morstan). Randall Park has recurred as James Moriarty. While Moriarty died, executive producer Craig Sweeny hasn’t ruled out Park returning; there are always, for example, flashbacks and hallucinations.
“I definitely wouldn’t rule [Moriarty haunting Watson] out. I mean, definitely the act will haunt Watson and you’d be a fool to say, I would never allow Randall Park to act in our show. I mean, I would love to see him again,” Sweeny told TV Insider.
How did Watson Season 1 end?
Moriarty targeted Watson’s team, resulting in twins Adam and Stephens needing a cure but there only being one dose after he manipulated Ingrid into destroying samples. But Watson then use Moriarty’s DNA against him, and the cure didn’t work as well as he’d hoped. He sat with the villain as he died. A two-week time jump then revealed that Watson was involved with pediatric oncologist Laila (Tika Sumpter).
What will happen in Watson Season 2?
The role he played in Moriarty’s death “really challenges [Watson’s] conception of who he is and what he’s capable of. And I think you’ll see it particularly in the season premiere. We’re doing a lot of new narrative stuff in Season 2,” Sweeny previewed. “It’s not all about looking back on what happened. But I think he does enter the season with a sense that I might not know myself as well as I thought I did, even though he probably wouldn’t do it differently. I think he’s really shaken and rattled by it and it’s affecting the way he’s dealing with the people around him.”
With Moriarty out of the picture, they’re not ruling out bringing in more villains from the world of Sherlock Holmes, “but we are creating a paradigm that includes Conan Doyle’s world without saying the premise is always what villain appears this year. So there is a really strong Holmesian storyline, but our plan is not to say, oh, this is Gruner or Milverton. Not to say that we won’t do that in time, but we wanted to sort of open up the paradigm of a new kind of storytelling within that universe in Season 2,” explained the EP.
There will be Sherlock Holmes characters introduced, and Rachel Hayward should be returning as Lestrade. “I’m excited to explore that relationship more in Season 2,” Sweeny said.
In general, looking ahead, he shared, “Hopefully, our intention is to create a really inventive take on how to draw the Sherlock universe into the show that goes deep into Watson’s character. I think you’re going to see a profound testing of the Watson and Mary relationship. We’re going to learn more about each of those characters’ backstories and their families and their history together. You’re going to see Sasha and Stephens in a surprising new light at the very beginning of the season. You’re going to see Adam forced to confront his ambitions and his own future at the clinic. And you’re going to see Ingrid wrestle with the possibility of if she can change. All against some great science, I mean, hey, who doesn’t want to watch that?”
Is Sherlock Holmes alive?
It’s unclear just yet. The series premiere began with both Sherlock and Moriarty seemingly dying after their confrontation at Reichenbach Falls, but the latter is alive and we haven’t seen a body for the former. Matt Berry voiced a hallucination of Sherlock during Season 1. It’s still to be determined if he would take on the role should the character appear onscreen.
Sweeny remained vague when TV Insider spoke with him about the finale. “I can say that I couldn’t imagine doing a show set in this universe and never seeing Sherlock Holmes, but I wouldn’t answer it in any more specific way than that,” he said.
“There’s a new and surprising take on how to bring the universe of Sherlock Holmes into a doctor show set in the States,” he added.
Is there a Watson Season 2 trailer?
Not yet. It’s too early for one.
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