Jimmy

Jimmy is a Producer, stunt pilot and driver for the Spectrum show Whitley's Guide. He never removes his helmet on-screen, and is usually presented as mute, but is implied to have provided off-screen dialogue on at least one occasion. If this voice does belong to Jimmy, then he has a British accent. Despite his on-screen muteness, Jax appears to understand what he is saying.

He is shown to be a competent pilot, though he is also shown to get into trouble while piloting when he briefly served as the main host of the show for one episode during Intergalactic Aerospace Expo 2951.

Appearance
Jimmy habitually wears a white shirt, thin black tie, black gloves, black leather-effect trousers, and a white Odyssey Helmet with an opaque black visor which he has apparently owned since childhood. This model of the helmet is not available elsewhere. During Intergalactic Aerospace Expo 2951 he is also seen wearing a flight suit, and a Crusader Industries winter coat. Jimmy's skin is visible around his neck, revealing that he is white.

Comparison to Timo Bakshi
Two-time Murray Cup winner Timo Bakshi fulfilled the role of pilot on Jax McCleary's former show, Galactic Gear. Like Jimmy, Bakshi is seen wearing a white Odyssey Helmet with opaque black visor that is not available in stores. Jimmy has owned this model of helmet since childhood, and is referred to as 'Jimmy' both by his mother and by Jax in behind-the-scenes footage   , confirming that despite superficial similarities of dress and profession, Jimmy and Bakshi are not the same individual. This does not eliminate the possibility that Jimmy or that style of helmet are associated with the Bakshi Family.

The possibility of two Jimmies
As well as his on-screen appearances, numerous calls and references are made to an off-screen Jimmy, who is on one occasion referred to as a Producer of the show. While it assumed that there is only one Jimmy, this is not wholly confirmed. It is possible that there is an alternative Producer Jimmy who performs off-screen tasks and has been heard to speak, and an entirely mute on-screen Jimmy who is only the stunt pilot and onetime host.

Intergalactic Aerospace Expo 2951
The segments for the Intergalactic Aerospace Expo 2951 are implied to be included in the broadcast, while other parts are implied to be behind-the-scenes footage.

Behind the Scenes
Jax McCleary and the shows he presents clear references to real-world automotive presenter Jeremy Clarkson, and his shows Top Gear and The Grand Tour. Therefore, Jimmy represents the mute helmet-wearing driver of Top Gear, who is called The Stig.