Young Sherlock backdrop
Young Sherlock Season 1

Season 4

In the fourth season, the show will move back to San Francisco as characters seek revenge and redemption. During his quest to slay his past ghosts, Ethan Kelly falls into a hellish labyrinth of criminality and betrayal by the police. Meanwhile, Mia Rochlan seeks revenge and will stop at nothing to make Ethan pay for double-crossing her.

201710 EpisodesDrama, Crime

Cast & Crew

Richard Schiff

Richard Schiff

Marty Stein

Cole Hauser

Cole Hauser

Ethan Kelly

Thandiwe Newton

Thandiwe Newton

-

Meaghan Rath

Meaghan Rath

Clea Annou

Episode Guide

Ethan returns to San Francisco hoping for a fresh start. But when Ray's brother asks for help, Ethan gets involved. Mia needs Marty's help to get her off a murder charge. Clea catches a businessman's murder that takes her down a rabbit hole.