Fred

The Seventh Doctor encountered a future incarnation at Bonjaxx's birthday party. Later, the Eighth Doctor had Shayde impersonate this incarnation for him.

Profile
Accompanied by his companion, Ria, this version of the Doctor greeted his incarnation and Ace at Maruthea during Bonjaxx's birthday celebration. Though close-mouthed about it, he implied that the Time Lords no longer had the power to impose the First Law of Time over him, so that he could converse with his seventh self with impunity. (DWM: Party Animals

Later, to fool the Threshold, the Doctor faked his own regeneration, having Shayde take his place and pretend to regenerate into this version of the Doctor. (DWM: The Final Chapter, Wormwood)

Other information
This incarnation of the Doctor, traveling alone, may have re-named himself Fred. (BBV: Cyber-Hunt, Vital Signs)

Behind the Scenes
This incarnation of the Doctor originated, played by Nicholas Briggs, first appeared in Time Ravagers, the second of the AudioVisuals series of fan audio plays. The opening of the story showed the previous AudioVisuals version of the Doctor regenerating into him. During the course of the AudioVisuals story Planet of Lies, the Daleks succeed in destroying Gallifrey. When this version of the Doctor meets the Seventh Doctor, he obliquely hints at this. Artworks for the AudioVisuals had established that his version of the Doctor resembled Briggs himself wearing dark formal clothes. He had a particular fondness for tea.

Gary Russell, the writer of Party Animals, had previously worked with Nicholas Briggs on the AudioVisuals series and had his Doctor appear in the story.

Nicholas Briggs appeared as "the Wanderer" or "Fred" in the BBV audio stories Cyber-Hunt and Vital Signs. Implicitly, these continue the adventures of the AudioVisuals Doctor past the concluding story of the productions.