A Son in the Oven
E1
Watson and the fellows spring back into action when Mary’s mother accidentally poisons herself while suffering from a rare form of dementia that is progressing with impossible speed. Meanwhile, Sherlock Holmes resurfaces after being presumed dead.
Back from the Dead
E2
A microbiology researcher returns from an expedition to Siberia, leading to a possible outbreak of a revived pathogen. Watson reconnects with Sherlock Holmes.
Expletive Deleted
E3
Watson and the team work alongside Laila to help a patient named Maxine, a 30-year-old who looks 10 years old.
Happy When It Rains
E4
Watson and the team jump into action when four new patients are brought to UHOP with wounds that appear to be infected with a flesh-eating bacterium following a tornado. Meanwhile, Shinwell searches for meaning as a nursing student and Adam’s wedding to Lauren risks being halted.
Lucky
E5
While visiting another hospital, Watson becomes convinced that a coma patient is suffering from locked-in syndrome and has been mistaken for a coma patient for over a decade. After the patient is transferred to UHOP for treatment, he shocks the team with chilling messages. Meanwhile, Sherlock is back in town and is staying with Watson.
Buying Time
E6
Watson and the fellows race against time to save the life of Xavier, a 21-year-old athlete with a fast-growing, seemingly incurable cancer. Meanwhile, Mycroft Holmes lets Watson know his team’s work at UHOP may no longer have funding available.
Giant Steps
E7
Watson's father, Hamish, visits UHOP to introduce Watson and the fellows to his protégé, Annabelle, a saxophone prodigy with musically induced blackouts. As Annabelle's condition worsens, Watson must confront his long-standing tensions with his father in order to save her.
Livvy Sees the Doctor
E8
UHOP veers into terror when Watson and the fellows are taken hostage by a man with a bomb strapped to his chest who is desperate to find a cure for his 9-year-old daughter’s illness.
Shannon Says Bex Loves Micah
E9
Watson and the fellows help Laila’s son Micah – who was injured in a car accident while pursuing his crush, Bex, with the help of his AI chatbot.
Never Been CRISPR'd
E10
Watson’s biohacker friend Hobie returns when he rushes his new girlfriend to the Holmes Clinic after they partake in a gene-editing experiment that goes wrong. Meanwhile, Watson becomes suspicious of Sherlock.
Episode 11
E11
The Hidden Moniker
E12
Young Lungs
E13
Green Thumb
E14