Cirrus@Austlit

'The Eighth Doctor detects a temporal anomaly on Armstrong's World, centred around the manor house of Baron Denton de Kay Leigh -- and involving one of his previous selves. While Charley investigates the Baron, the Doctor sets off in search of his earlier incarnation and finds the Seventh Doctor investigating a temporal anomaly that has destroyed the party worlds of the Van Koll system. The Baron has found an Ikoran artefact that enables him to strip people of their memories and personalities; he has been using it for his own amusement, and when Charley is captured, he rewrites her personality into that of a mercenary named Venetia and sends her to steal the TARDIS tracker that the Seventh Doctor had given to Hex. When Charley touches the tracker, however, her old memories begin to return, and she follows the tracker back to the TARDIS -- thus leading the Baron's henchmen to it. Fascinated, the Baron decides to reduce Charley to the basic components of her self and learn all about her; however, he's unaware that she is a living temporal anomaly, and that placing her in the chair will cause the temporal distortion that destroys the Van Koll system. The Seventh Doctor has discovered the truth, and has turned the Baron's henchmen to his side, using a combination of bribery and threats; he now leaves the Eighth Doctor to lead them to the Baron's manor house and destroy the artefact. However, the Eighth Doctor refuses to bully the henchmen into submission, and he releases them from the Baron's punishment collars and gives them the opportunity to help him of their free will. They decide to do so, and while they are fighting the Baron's robot guards, the Seventh Doctor slips into the manor house and frees Charley. The Baron captures the Seventh Doctor, places him in the artefact and devours his memories -- but the Doctor's mind is more powerful than he'd expected, and by taking it into himself, the Baron gives the Doctor the ability to control him. The Doctor uses the artefact to reconstitute himself, forces the Baron to sit in the artefact himself, and rewrites his personality and memories to make him a genial old man who genuinely cares for the colony he rules. When the Eighth Doctor arrives, his previous self has destroyed the artefact, and Charley is just recovering -- but while the Eighth Doctor is grateful that Charley has been spared, he's aware that her underlying condition will only grow worse...'

Source: drwhoguide.com (http://www.drwhoguide.com/whotrip16.htm). Sighted: 19/5/11