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Young Sherlock Season 1

Season 4

Season 4 of A.P. Bio intensifies the series' evolution into a high-energy, absurdist ensemble comedy. Streaming on Peacock, it centers on Jack Griffin as he fully embraces his chaotic mentoring role to his students while navigating his own unresolved family trauma.

20218 EpisodesComedy

Cast & Crew

Glenn Howerton

Glenn Howerton

Jack Griffin

Patton Oswalt

Patton Oswalt

Principal Ralph Durbin

Paula Pell

Paula Pell

Helen Henry Demarcus

Mary Sohn

Mary Sohn

Mary

Jean Villepique

Jean Villepique

Michelle

Lyric Lewis

Lyric Lewis

Stef

Episode Guide

A tornado triggers a school lockdown, while the kids craft fan fiction about the faculty members.

Season 4 FAQs

The cast of Season 4 includes Glenn Howerton as Jack Griffin, Patton Oswalt as Principal Ralph Durbin, Paula Pell as Helen Henry Demarcus, Mary Sohn as Mary, Jean Villepique as Michelle, and Lyric Lewis as Stef.