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Young Sherlock Season 1

Season 4

While the world recovers from the global catastrophe of last season, a changed Mark struggles with guilt as he fights to protect his home and the people he loves, setting him on a collision course with a powerful new threat that could alter the fate of humanity forever.

20268 EpisodesAnimation, Drama, Sci-Fi & Fantasy, Action & Adventure

Cast & Crew

J.K. Simmons

J.K. Simmons

Nolan Grayson / Omni-Man (voice)

Sandra Oh

Sandra Oh

Debbie Grayson (voice)

Steven Yeun

Steven Yeun

Mark Grayson / Invincible (voice)

Episode Guide

Mark battles enemies new and old in his fight to keep Earth safe.

Season 4 FAQs

The cast of Season 4 includes J.K. Simmons as Nolan Grayson / Omni-Man (voice), Sandra Oh as Debbie Grayson (voice), and Steven Yeun as Mark Grayson / Invincible (voice).