He also shared later adventures alongside devious schoolboy Vislor Turlough (Mark Strickson) and American college student Peri Brown (Nicola Bryant).

[5] The Fifth Doctor's era was notable for a "back to the basics" attitude, in which "silly" humour (and, to an extent, horror) was kept to a minimum, and more scientific accuracy was encouraged by the producer, John Nathan-Turner.

After recovering in the fictional city Castrovalva (actually an elaborate trap created by his arch-enemy the Master), he continued his travels with Adric, Tegan Jovanka and Nyssa.

After trips to the future and the past encountering villains such as Monarch and the Mara, the Fifth Doctor was confronted with tragedy when Adric died trying to stop a space freighter from crashing into prehistoric Earth (Earthshock).

Faced with this threat, the Time Lords were forced to attempt executing the Doctor, but he eventually tracked Omega to Amsterdam where he defeated him and re-encountered Tegan (who having now lost her job, had no second thoughts about rejoining the TARDIS crew).

After meeting the entities known as Eternals racing in yacht-like spacecraft for the prize of "Enlightenment", Turlough broke free from the Black Guardian's influence, and continued to travel with the Doctor and Tegan.

The Doctor met three of his previous incarnations when they were summoned to the Death Zone on Gallifrey by president Borusa, who was attempting to gain Rassilon's secret of immortality.

He frequently wore an optimo-style Panama hat that had a red band with a black and white pattern, which he would roll up and place in an inside coat pocket.

The Tenth Doctor, who inherited various traits from this incarnation such as spectacle use, revealed in "Time Crash" that the spectacles were not actually needed to aid the Doctor's eyesight but were just for show to make him look clever (perhaps to counter his youthful appearance), although in Four to Doomsday, he makes a remark about being a bit short-sighted in one eye when questioned about the contents of his pockets, which included the aforementioned cricket ball, a book (The TARDIS Manual) and a magnifying glass.

In the same story, while attempting to revive a feverish Peri from spectrox toxaemia, he had noted that celery was an "excellent restorative from where I come from," but that the human olfactory system was "comparatively feeble."

Supporting this assertion, in the 2010 episode "Cold Blood", the Eleventh Doctor asks if there is any celery handy after being subjected to a decontamination process intended for humans (which proved potentially lethal to a Time Lord biology).

Peter Davison stated in an interview on the DVD of Castrovalva that he thought the clothes he wore were far too "designed" and that he would have still kept them, but wanted to add some individual flair to them, as other actors portraying the Doctor have done in the past.

In 2023, Davison returned to the role again in Tales of the TARDIS, when he and Tegan were reunited a second time to remember the events of the serial Earthshock and to emotionally overcome the death of their friend Adric.