The Doctor and Sarah arrive in Renaissance Italy unaware that they have brought with them.
The Mandragora energy combines forces with the secret Brotherhood of Demnos.
Hieronymous plots to eliminate the threat posed by the Doctor and uses an unwitting Sarah as his weapon.
As the leading scholars of the era assemble in the palace for the masque, Mandragora prepares to attack.
Sarah Jane is knocked unconscious by a rock-breaking explosion and is taken to hospital.
The fossilised hand is now in the possession of a technician called Driscoll at Nunton Power Station.
Eldrad persuades the Doctor to take him back to Kastria, so that he might reclaim his heritage.
Eldrad reconfigures his body to its final, male form. Furious with finding his world dead.
After a premonition of murder, the Doctor returns home to Gallifrey.
The Time Lord president has been assassinated and the Doctor is the prime suspect.
The Doctor has entered the computation Matrix to prove his innocence.
The Doctor has won his fight in the Matrix and revealed the assassin.
The Doctor arrives on an alien world and is taken captive by the savage Sevateem tribe.
With the Sevateem against him, the Doctor attempts to win their trust by facing the trial of the Horta.
Penetrating the barrier with Leela, the Doctor enters the spaceship which is controlled by the Tesh.
Determined to rectify his earlier mistake, the Doctor tries to repair Xoanon.
The TARDIS takes the Doctor and Leela to a huge, mobile sand mine on an alien world.
The Doctor and Leela are blamed for the murder of one of the sandminer’s crew.
One of the crew is the insane Taren Capel, who is using robots to carry out the murders.
The Doctor and Leela join forces with the surviving crew members to defend themselves from the robots.
London, the 1890s. A spate of disappearances amongst young women goes largely unnoticed.
The Doctor and Leela take refuge at the home of Professor Litefoot.
Leela takes the opportunity to track the Chinese God to his lair where she must confront one of his terrifying creations.
The Doctor and Leela attend Li H'Sen Chang's performance, hoping to confront the magician.
The Doctor and his allies try to track down Weng-Chiang.
The Doctor and Weng-Chiang have their final confrontation in the mysterious House of the Dragon -- watched by the evil duplicitous Mr.