Jamie shares a lively, bantering relationship with the Doctor and, during his time in the TARDIS, sees the arrival and departure of first Victoria Waterfield and finally Zoe Heriot.
While not having the background to always understand the situations his adventures with the Doctor take him into, Jamie is quick enough to translate high technology and concepts into equivalents he can comprehend and deal with.
Jamie is heartbroken when Victoria decides to stay with the Harris family at the end of Fury from the Deep, to the point of even being briefly angry with the Doctor for allowing her to leave (The Wheel in Space).
Jamie's interdimensionary travels come to an end on the battlefields of The War Games, when the Time Lords place the Doctor on trial for interfering with the universe.
An older Jamie, still portrayed by Hines, returns in the 60th anniversary spin-off Tales of the TARDIS alongside Wendy Padbury as Zoe.
In this story, written by Grant Morrison, Jamie sacrifices himself to stop the titular world shaper machine which was evolving aliens into Cybermen.
In the Virgin New Adventures novel Timewyrm: Revelation, writer Paul Cornell omitted Jamie from the group of deceased companions encountered by the Seventh Doctor.
Big Finish Productions have reunited Jamie with the Sixth Doctor in a series of audio plays starting with City of Spires, where he appears to have become a rebel leader known as 'the Black Donald'.
However, in the final story, Legend of the Cybermen, it is revealed that this Jamie is simply a fictional construct within the realm seen in The Mind Robber, created by an older Zoe, based on her memories of the real Jamie, to protect the Doctor until he could come to her aid, making him older and creating his 'Black Donald' identity to give him a heroic backstory in the Doctor's absence.
[4] This character wore a kilt, which I thought rather fetching, and demonstrated—in this particular episode—a form of pigheaded male gallantry that I've always found endearing: the strong urge on the part of a man to protect a woman, even though he may realize that she's plainly capable of looking after herself.