The Cobalt Fissure
EpisodeS2E2044 min2026-05-03

Watson

The Cobalt Fissure

A seemingly random murder outside of UHOP sets the stage for the arrival of someone from Watson and Sherlock Holmes' past.

My Thoughts
Guest Stars
Special appearances in this episode.

Guest Stars

Hampton Fluker

Dr. Isaac Niles

Karen Robinson

Brenda the Battle Axe

Rachel Hayward

Detective Lestrade

John Cassini

Dr. Ivan Ferry

Robert Carlyle

Sherlock Holmes

Riley Orr

Glen/Croft Twin

Марго Бингхэм

Nurse Carlin DaCosta

Rochelle Aytes

Dr. Mary Morston

Eddie Izzard

Sebastian Moran

Elizabeth Blanco

Luna Quinn

Bex l Grant

Nurse Laura Chambers

Crew
Episode-specific crew credits.
Larry Teng

Larry Teng

Director

Directing

SM

Sharon Moalem

Writer

Writing

RH

Rebecca Hofherr

Writer

Writing

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