Watson season 2 episode 4, Happy When It Rains, follows Shinwell Johnson as he faces the challenges of his new role as a nursing student. After a tornado hits the city, he notices several patients developing similar oozing rashes. When his supervisor dismisses his concerns, Shinwell chooses to bypass her and bring the cases to the medical team.
This decision ultimately leads to the discovery of fungal infections, though one patient still requires leg amputation. Shinwell’s choice to advocate for his patients despite obstacles and emotional strain demonstrates his growth, professionalism, and commitment to patient care, marking the central turning point of the episode.
Disclaimer: This article contains major spoilers. Read at your own discretion.
What led Shinwell to his choice in Watson season 2 episode 4?

In Watson season 2 episode 4, Shinwell Johnson transitions from being Watson’s assistant to training as a nursing student. Episode 4 shows a day at Shinwell's work as he has to confront the problems that come with being a doctor. One of his patients, Ben, develops a serious illness that makes it necessary to cut off his leg. Shinwell questions whether he could have prevented the outcome, but Watson assures him that he bears no responsibility.
Watson says that Shinwell's diligent observations helped find a pattern of infection in several patients. Shinwell’s concern for Ben and attention to his duties led him to seek guidance from Watson, even when it required bypassing Senior Charge Nurse Carlin DeCosta.
How did the roof scene influence Shinwell’s decision?
The rooftop in Watson season 2 serves as a place for reflection and personal connection. In episode 4, a flashback shows Watson and Mary on the roof after their first date, establishing it as a space for processing emotions.
Later, Watson asks Shinwell to come to the roof with him during a rainstorm to help him cope with the stress of being a nurse. He tells Shinwell to reflect on the good things he has done instead of the patients he couldn't save. Shinwell decides to take this counsel because he knows that some things are beyond his hands. This decision shows how important mentorship and personal connection are in high-stress jobs.
The scenario on the roof lets Shinwell take a break from the stress of his job, think about what he's done, and get a new perspective. At the end of the episode, Shinwell leaves the rooftop with a slight smile, which indicates that he understands and feels better.
What does Shinwell’s choice mean for his relationships?

In Watson season 2 episode 4, Shinwell’s choice also affects his personal interactions. The episode indicates that he is becoming closer to Nurse DeCosta, who sees how dedicated and reliable he is. Shinwell establishes trust that helps both professional and personal relationships by being honest and fair with patients and coworkers.
The episode shows how he has grown outside of Watson's influence by showing how he handles medical and mental problems on his own. His choices show that he is responsible and caring, and they affect his role and connections now instead of being based on his past.
The impact of Shinwell's choice on patient care
In episode 4, Shinwell sees that some patients are showing strange symptoms after the tornado and chooses to talk to Watson instead of his supervisor, DeCosta, who doesn't want to do it. He makes sure that the fungal outbreak is properly discovered by speaking up for Ben and raising concerns about the infections, even though Ben ends up losing his leg.
Shinwell's choice shows how much he cares about his patients, doing the right thing, and growing as a professional. It shows that being responsible under pressure is more important than knowing what will happen. This choice in Watson season 2 emphasizes Shinwell's compassion, toughness, and important part in both the medical team's story and the show's overall plot.
New episodes of Watson premiere Mondays at 10/9c on CBS and stream the next day on Paramount+.