J is for... Jones, Santiago

 

Santiago, 18, was one of the grandsons of Jo Jones (nee Grant) - one time companion to the Third Doctor. He had been born in the city of Santiago, Chile. He accompanied his grandmother to a UNIT base at the foot of Mount Snowden for the funeral of the Doctor, whose body had been retrieved from a battlefield by the vulture-like alien Shansheeth. 

Here he met Sarah Jane Smith and her young companions Clyde Langer and Rani Chandra. When Clyde began body-swapping with the Doctor - who was still very much alive but trapped on an alien planet without his TARDIS - the youngsters came under threat from the Shansheeth. They had allied themselves with a corrupt UNIT officer - Colonel Karim - to take control of the TARDIS. They required a key, however, and intended to create one from the memories of Sarah and Jo. 

Santiago and the others were helped by a Groske - blue-skinned cousins of the Graske, one of whom worked in the base.

Santiago had led a remarkable life, travelling all over the globe - but he hardly ever saw his parents, and was jealous of the settled lives of Clyde and Rani, who in turn were jealous of his lifestyle.

Once the Shansheeth and their ally had been defeated, Santiago and his grandmother were off to Norway by hovercraft to take part in an anti-nuclear rally.

Played by: Finn Jones. Appearances: SJA 4.3 Death of the Doctor (2010).

• Finn Jones featured regularly in Game of Thrones as Loras Tyrell, and has also played the Marvel character Iron Fist on TV.
• Santiago Jones was due to reappear in the planned finale of Series 5 of The Sarah Jane Adventures - an episode to be called "The Battle of Bannerman Road".