Randal Mann was the sound man of a radio station that employed DJ Dwight Dread. During one of his shows, Dread died, and Mann was one of the five suspects in his murder.
Mann was once a musician with striking features who had a penchant for high heels and cross-dressing, but gave up his career and became a sound technician for a radio station. He worked on a radio show directed by Mike de Bonair and soon started to flirt with the DJ, Dwight Dread. Mann heard rumors of a relationship between Dread and Anice Brewer, the tea lady, whom he didn't know very well, but had never seen the two together.
On the day of the show where singer Dolly Hollerday made a guest appearance, Mann came into the studio first alongside de Bonair. They chatted for a while until Brewer brought them their drinks. Eventually, Dread arrived with Hollerday and Melody Smith, her manager. The show went well until Dread started choking on a macaroon and collapsed on the floor. de Bonair quickly had Mann switch to an ad about a sale at Farrods and called emergency services. Mann, flustered by Dread's incident, waited for them with a security guard who he found attractive, but due to the show being on during rush hour, it took them much longer for them to reach the radio station.
When the police came, Mann gave his statement about what happened after Dread collapsed on the floor and that the tea Dread and Hollerday were going to drink was brought in Brewer. The police assumed the killer was assumed to be Brewer after she was found dead at a storeroom having seemingly committed suicide, with the fax request resembling a death threat being confirmed to be written by her and a broken bottle of poison being found near her. However, the "death" that Mann saw during the show turned out to be a prank devised by de Bonair and Dread, and the latter was killed after Mann left to call for help. As Mann, Smith and Hollerday all had an alibi for the time after Dread "died", de Bonair was revealed as the killer.
- Randall is a rare example of an openly queer character in the series, having flirted with the male victim and said of a security guard "he was just my type".
- His given name has the pet name of "Randy", making his name a potential play on the phrase "randy man", which refers to man who is easily aroused and excited. Alternatively, it can be seen as a play on "scandal man".