Tom Baker (in-universe)

Tom Baker was an actor who played the Fourth Doctor in the BBC science fiction series Doctor Who.

Biography
Tom Baker (as the Doctor) was present on a Doctor Who jigsaw released in 1977. He was Paul Magrs' favourite actor to portray the character. (PROSE: The Story of Fester Cat)

Sometime around 2000, Paul wrote a prose piece about what influenced and inspired him with his works, and in that piece, he mentioned that Tom Baker "was" (in a cosmetic sense) the Fourth Doctor. (PROSE: Bafflement and Devotion)

Around 2007, Paul was in awe that he actually got to work with Tom when the scripts that he wrote were being produced into CDs. (PROSE: The Story of Fester Cat)

Behind the scenes
This in-universe version of Tom Baker would later appear in Bafflegab Productions' Baker's End series.

Tom Baker was planned to cameo in The Dying Days, but he was ultimately cut. His co-star Lalla Ward appeared, albeit not by name.

Information from invalid sources
Tom's friend Louise Jameson once spoke to Tom over the phone, telling him about how wonderful her Home Assistant was, but she had to disconnect when it malfunctioned and began trying to kill her. (NOTVALID: The Home Assistants of Death?!)