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Young Sherlock Season 1

Season 3

20176 EpisodesCrime, Drama, Mystery

Cast & Crew

Robson Green

Robson Green

Geordie Keating

Al Weaver

Al Weaver

Leonard Finch

Tessa Peake-Jones

Tessa Peake-Jones

Mrs. Maguire / Mrs. Chapman

Kacey Ainsworth

Kacey Ainsworth

Cathy Keating

Skye Lucia Degruttola

Skye Lucia Degruttola

Esme Keating

James Norton

James Norton

Sidney Chambers

Morven Christie

Morven Christie

Amanda Kendall

Tom Austen

Tom Austen

Guy Hopkins

Selin Hizli

Selin Hizli

Margaret Ward

Episode Guide

When Sidney Chambers begins receiving sinister anonymous phone calls, he realises he is connected to a series of murders targeting respected figures in the community. Leonard bonds with Hilary as she cares for her dying father, while Geordie's investigation of the killings leads him to a mysterious home for people with disabilities.

Season 3 FAQs

The cast of Season 3 includes Robson Green as Geordie Keating, Al Weaver as Leonard Finch, Tessa Peake-Jones as Mrs. Maguire / Mrs. Chapman, Kacey Ainsworth as Cathy Keating, Skye Lucia Degruttola as Esme Keating, James Norton as Sidney Chambers, Morven Christie as Amanda Kendall, Tom Austen as Guy Hopkins, and Selin Hizli as Margaret Ward.