They are established as former friends with a deep, shared history on Gallifrey. Their interactions are often described by fans as a "cosmic dance," filled with mutual admiration and intellectual flirting despite their lethal goals.

The Doctor initially dismisses Jo due to her perceived lack of scientific background, but her bravery in facing the Autons and the Master quickly earns his respect.

The Master also makes his first appearance in this specific file/episode. Their relationship is the series' most complex "romantic" parallel:

To explore these characters further, you can find the complete episode and series archive at the Internet Archive's Doctor Who collection. Doctor Who : Free Download, Borrow, and Streaming

The Master functions as the Doctor’s dark reflection, creating a storyline of obsession that persists for decades. Subplots and Romantic Tensions

Relationships and romantic storylines in —a file name specifically associated with Doctor Who (Season 8, Episode 1: Terror of the Autons )—revolve around the introduction of a more settled "family" dynamic within the UNIT era. The Key Relationship: The Doctor and Jo Grant

This era hints at a light, flirtatious chemistry between Captain Mike Yates and Jo Grant . It serves as a grounded, human contrast to the Doctor's alien detachment.