The enigmatic Doctor, wary that Ian and Barbara will reveal his secrets to the people of 20th-centur...

Prisoners of the earliest humans, the TARDIS crew are caught in a deadly power play for leadership o...

The TARDIS crew must make fire for the early humans to stay alive. But once they do, they may not be...

Time Unknown, Planet Unknown. The TARDIS lands in an eerie petrified forest overlooking a magnificen...

The dead planet is not uninhabited after all. The Doctor is about to meet what will become his great...

Imprisoned on Skaro by the scheming Daleks, the Doctor and his companions work to escape their clutc...

The time travellers work desperately to both escape the Dalek city and prevent a bloody massacre.

The time travellers have escaped from the Daleks, but left a vital piece of the TARDIS behind. Getti...

Ian, Barbara and the Thals struggle through the caves to reach the Dalek city. Will they get there i...

Time is running out as the Doctor and his companions try to defeat the Daleks before they wipe out a...

A mysterious explosion has knocked the TARDIS into void. And in their confusion, the crew are turnin...

The TARDIS is adrift, the crew turning on each other. Only by working together can they find their w...

The TARDIS experiences a total power failure and is stranded in the Himalayas in the 13th century. T...

Tegana sabotages the party's water bags, leaving them in dire need of fresh supplies.

The Doctor and Susan are able to supply Marco with condensation that has formed inside the TARDIS, s...

The Doctor's group manage to rescue Barbara from the Mongols but once more Marco remains unaware of ...

The Doctor and his friends elect to warn Marco of Acomat's attack even though it means losing their ...

The Doctor, Ian and Barbara are forced to surrender to Tegana and Marco, leaving both of them the op...

Tegana finally makes his move to assassinate the Khan, giving the Doctor and his friends an opportun...

The alien world of Marinus. Perfect peace has reigned here for decades due to the mind-controlling i...

The Doctor and his friends arrive in the apparently idyllic city of Morphoton but Barbara soon begin...

The search for the second key takes the travellers to a jungle where Ian and Barbara come under thre...

Searching for the third key, Ian and Barbara meet with the sinister trapper Vasor before following S...

The group are reunited with the Doctor in the city of Millennius where Ian faces trial for murder af...

The Doctor and his friends must locate the real murderers and the fourth key before heading off for ...

The TARDIS arrives on Earth landing in 16th century Aztec society. Barbara goes off exploring - desp...

Barbara tries to change the course of history - and Ian fights for his life.

While the Doctor tries to find a way back to the TARDIS, Tlotoxl continues to plot Barbara's downfal...

Tlotoxl's machinations result in both Susan and Ian being arrested. With the TARDIS once again trapp...

The 28th century. The TARDIS materialises on a spaceship orbiting a planet known as the Sense-Sphere...

The Doctor and his companions are on board an Earth ship trapped in orbit around the Sense-Sphere wh...

The Doctor and his companions are escorted to the Sense-Sphere where they attempt to negotiate with ...

With Ian having fallen victim to the Sensorites' plague, the Doctor is desperate to find a cure. But...

The City Administrator is determined to destroy the Doctor and his friends and his paranoia prevents...

While the City Administrator's schemes reach their climax, the Doctor and Ian venture into the tunne...

The TARDIS lands during the French Revolution, where Ian, Barbara, and Susan become caught up in the...

Susan, Ian and Barbara are sentenced to be guillotined but an encounter with a dying English prisone...

Susan and Barbara are rescued by Jules and Jean, two members of the escape chain, while the Doctor g...

The Doctor is forced into a meeting with Robespierre while Barbara's attempts to find a physician fo...

Ian finds himself held prisoner by the treacherous Leon while the Doctor attempts to engineer Susan ...

Ian finally delivers his message to James Stirling but in order to secure Susan's release he and Bar...