Where can I watch “Sherlock” Season 4 Episode 3 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

Do I need to watch earlier episodes before “Le dernier problème”?

Watching earlier episodes in season 4 helps you follow the plot and character arcs leading into this episode.

Watch Sherlock Season 4 Episode 3 Online

“Le dernier problème” — Watch "Sherlock" Season 4 Episode 3 online in HD for free. Check streaming providers, cast, and episode details.

Jan 15, 2017 Season 4 Episode 3 89 min 15

7.5 ★ ★ ★ ★ ★

145 votes

Sherlock Season 4

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Where can I watch "Le dernier problème" online?

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Season 4 Episode 3 — Aired on Jan 15, 2017 • runs about 89 minutes.

Directed by Benjamin Caron.

Written by Mark Gatiss, Steven Moffat.

Notable cast/guest names in this episode include Benedict Cumberbatch, Martin Freeman.

This page includes 6 official still(s) (when available) plus legal availability links.

Looking for “watch Sherlock Season 4 Episode 3 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Sherlock Holmes et John Watson ont découvert le plus grand secret de Mycroft : il a caché l'existence d'Eurus Holmes, leur sœur, psychopathe à l'intelligence redoutable. Traumatisé par sa sœur dans son enfance, la mémoire de Sherlock a fait un blocage complet sur son existence. Sherlock décide de la confronter dans sa prison, espérant débloquer ses souvenirs, mais Eurus l'attend.