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.
| Release Date | July 23, 1946 | |
|---|---|---|
| Status | Released | |
| Original Title | The Mysterious Mr. M | |
| Runtime | 3h 47min | |
| Budget | — | |
| Revenue | — | |
| Language | English | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | Universal Pictures | |