Nandor Fodor and the Talking Mongoose is a 2023 British black comedy film written and directed by Adam Sigal and starring Simon Pegg, Minnie Driver and Christopher Lloyd and featuring the voice of Neil Gaiman.

Renowned parapsychologist Nandor Fodor travels to Isle of Man with his assistant Anne to investigate the case of Gef the talking mongoose, believed to live at or around the farmstead of James Irving, local wealthy merchant.

Most of the local residents believe firmly in Gef's actual existence, although sightings of the mongoose are much rarer than ear-witness reports, and those are invariably cursory glimpses of some furry creature "out of the corner of the eye" for a split second.

Later in the evening Fodor gets drunk and forces his way violently into the barn where Gef made his appearance; Errol knocks him on the head with an iron bar and he comes to in a cell at the police station.

Fodor's demand to be allowed to make a phone call to arrange his release is left unheeded, and he hears Gef's sneering and taunting voice.

Photos from the 1936 book The Haunting of Cashen's Gap: A Modern "Miracle" Investigated by Harry Price and Richard S. Lambert are shown alongside the closing credits, followed by onscreen caption "Producers, cast, and crew wish to thank members (and mongooses) of Gef's army.