Ian is knighted by King Richard and sent to rescue Barbara. The King's Chamberlain becomes suspicious of the Doctor and Vicki. Barbara makes a bid to escape from her kidnappers. Show more
Ian and Vicki are trapped by a tentacled creature on the planet Aridius. Meanwhile, the Doctor and Barbara witness Daleks set off on a mission to eliminate them!
The Doctor and his friends have been given shelter from the Daleks by the Aridians. But the Daleks threaten to kill the Aridians unless they hand over the time travellers.
The Daleks pursue the TARDIS through time and space. In an attempt to lose the Daleks, the Doctor makes a stop on the top of the Empire State Building and then on a sailing ship.
With the Daleks in pursuit, the TARDIS lands in what appears to be a haunted house. When the Daleks arrive, the travellers depart, not realising that they have left Vicki behind!
The Daleks follow the TARDIS to the jungle world of Mechanus which is infested with lethal plants. The Daleks release a robot double of the Doctor that is programmed to kill.
The Doctor and his friends are taken prisoner by the Mechonoids. There they meet fellow prisoner, Steven Taylor. The Daleks break into the Mechonoid city and a battle commences.
The TARDIS lands on the English coast in 1066, but the travellers are puzzled to find modern day artefacts. A monk observes the arrival of the TARDIS, but seems unsurprised.
The Doctor is held prisoner by the Monk in the monastery whilst Vicki and Steven search for him. Meanwhile, a Viking war party arrives ahead of the main invasion fleet.
Steven and Vicki discover an atomic bazooka. It seems that the Monk has plans for the Viking invaders. Returning to the Monastery, Steven and Vicki make an amazing discovery.
Discovering the Monk's plan, the Doctor is determined to stop him meddling with history. As the Viking fleet approaches, time is running out for both the Monk and the Doctor.
Ian plans to derail the Daleks' plan by sabotaging their bomb and the Doctor works to turn the Robomen against them. Afterwards, a tearful Susan remains on Earth with her new love.
Arriving on the planet Dido, the Doctor, Barbara and Ian discover a crashed spaceship from Earth and survivors. They are terrorised by the monstrous Koquillion who attacks Barbara.
Ian and Barbara discover that the paralysed Bennett has gone missing from his cabin. The Doctor discovers the truth about Koquillion, but endangers his own life in doing so.
After relaxing at a Roman villa the Doctor is mistaken for a murdered lyre player and targeted by an assassin. Meanwhile, Ian and Barbara are captured by slave traders.
Barbara is sold as a slave and Ian is to be trained as a gladiator. The Doctor and Vicki arrive at the Emperor's court with the Doctor still masquerading as Maximus Pettulian.
Poppaea plans to poison Barbara who has become the object of Nero's affections. The Doctor is to be thrown to the lions and Ian and Delos are set against each other in the arena.
Inspired by the Doctor, Nero sets Rome ablaze. Ian must fight his way out of the arena and rescue Barbara. The Doctor and Vicki hurry to flee the city and escape to the TARDIS.
The TARDIS is pulled down to the barren world of Vortis. The Doctor and Ian explore. Barbara falls under an hypnotic influence and is compelled to leave the safety of the TARDIS.
Rescued by the Menoptra, Barbara is then captured by the ant-like Zarbi. The Doctor and Ian trace the missing TARDIS to a giant web city and encounter a mysterious intelligence.