The Mysterious Mr. M_
"1000 startling adventures! 1000 weird sensations!"
An evil scientist known as "Mr. M." uses a drug he has developed called "hypnotreme" to help steal submarine equipment. Federal agent Grant Farrell is dispatched to find the mysterious villain and stop his nefarious plans.
Starring
Edmund MacDonald, Pamela Blake, Danny Morton
Updated Feb 16, 2026
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Year context
The Mysterious Mr. M was released 80 years ago in 1946.
Overview
An evil scientist known as "Mr. M." uses a drug he has developed called "hypnotreme" to help steal submarine equipment. Federal agent Grant Farrell is dispat...
The Mysterious Mr. M is a Action, Mystery film with a runtime of 3h 47m.
CAST (13)
Edmund MacDonald
Anthony Waldron
Pamela Blake
Shirley Clinton
Danny Morton
Derek Lamont
Virginia Brissac
Cornelia Waldron
Joseph Crehan
Dan Blair
Jack Ingram
William Shrag
Dennis Moore
Agent Grant Farrell
Richard Martin
Detective Lt. Kirby Walsh
Byron Foulger
Wetherby
Jane Randolph
Marina Lamont
William Ching
Jim Farrell
JH
Joe Haworth
Donninger
PA
Patricia Alphin
Ms. Buckley
DETAILS
FREQUENTLY ASKED QUESTIONS
What is The Mysterious Mr. M about?
An evil scientist known as "Mr. M." uses a drug he has developed called "hypnotreme" to help steal submarine equipment. Federal agent Grant Farrell is dispatched to find the mysterious villain and stop his nefarious plans.
How long is The Mysterious Mr. M?
The Mysterious Mr. M has a runtime of 227 minutes (3h 47m).
Who stars in The Mysterious Mr. M?
The cast of The Mysterious Mr. M includes Edmund MacDonald, Pamela Blake, Danny Morton, Virginia Brissac, Joseph Crehan.
What is the rating of The Mysterious Mr. M?
The Mysterious Mr. M has a rating of 3.8 out of 10 based on 2 votes on TMDB.
GENRES (2)
Action
Mystery