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Watson S2E18 — Sic Semper Tyrannis

7.4

Watson•Season 2•Episode 18

Sic Semper Tyrannis

7.4/10 · 144 votesApr 19, 202643 min

Ranked #15 of 20 in Season 2•−0.1 vs season avg

Following his brain tumor diagnosis, Watson goes on medical leave to seek treatment, leaving Mary in charge of The Holmes Clinic as a notorious South American dictator demands Watson see to his mysterious autoimmune condition personally. Meanwhile, Ingrid grows more concerned about Beck’s obsession with

Directed byClara Aranovich

Written byMichael Narducci

Previous episodeE17 · Unsolved Mysteries Next episodeE19 · Rule of Three

Seasons2

Cast6

Morris Chestnut

Morris Chestnut

Dr. John Watson

Eve Harlow

Eve Harlow

Dr. Ingrid Derian

Peter Mark Kendall

Peter Mark Kendall

Dr. Stephens Croft / Dr. Adam Croft

Inga Schlingmann

Inga Schlingmann

Dr. Sasha Lubbock

Ritchie Coster

Ritchie Coster

Shinwell Johnson

Rochelle Aytes

Rochelle Aytes

Dr. Mary Morstan

Crew2

Clara Aranovich

Clara Aranovich

Director

M

Michael Narducci

Writer

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Episode Summary

"Sic Semper Tyrannis" is episode 18 of Watson season 2. It scored 7.4/10 from 144 votes, ranking #15 of 20 episodes this season (season average 7.5). Directed by Clara Aranovich and written by Michael Narducci, it aired on April 19, 2026.

Next: E19 · Rule of Three Best of Season 2