This Man Is Dangerous (U.S. title: The Patient Vanishes and Death Cell) is a 1941 British thriller film, directed by Lawrence Huntington and starring James Mason and Gordon McLeod.

Mick gets to work and, aided by his secretary Molly, tracks down the kidnappers to a shady nursing home in a remote rural area.

Mick manages to escape in the nick of time, and also rescues a member of the gang who had apparently been deemed surplus to requirements and had also been left to die on the blazing ship.

A dramatic confrontation follows, and just as things are starting to look desperate for Mick, his father turns up with a Scotland Yard posse to save the day.

The Monthly Film Bulletin wrote: "An admirable cast under the very capable direction of Lawrence Huntington keep the suspense at boiling-point until the end."