7.3

Murdoch Mysteries•Season 20•Episode 2

Arcana Dei

7.3/10 · 54 votesOct 12, 202644 min

Ranked #5 of 5 in Season 20•−0.6 vs season avg

Discussion

Three French priests are found murdered in a hotel and Murdoch must find out who they were protecting with their lives before it is too late.

Previous episodeE1 · The Maltese Falconer Next episodeE3 · The Big Smoke

Seasons20

All 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Season 20 Episodes6

The Maltese Falconer

Arcana Dei

The Big Smoke

Off-Menu Murdoch

Missing Persons

A Date with Fate

Cast5

Yannick Bisson

Detective William Murdoch

Helene Joy

Dr. Julia Ogden

Thomas Craig

Chief Constable Thomas Brackenreid

Jonny Harris

Constable George Crabtree

Lachlan Murdoch

Constable Henry Higgins

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Episode Summary

"Arcana Dei" is episode 2 of Murdoch Mysteries season 20. It scored 7.3/10 from 54 votes, ranking #5 of 5 episodes this season (season average 7.9). It aired on October 12, 2026.

Next: E3 · The Big Smoke Best of Season 20