Doctor Who - Season 4

Donna and the Doctor reunite and must save the lives of millions threatened by a sinister alien... Allons-y!

It's Volcano Day in Pompeii... Can Donna dare the Doctor to change history?

The Doctor takes Donna to her first alien world, where she finds the human race has developed dark secrets...

Martha Jones summons the Doctor back to UNIT and modern-day Earth, but an old enemy lies in wait.

As the Sontarans choke the Earth, the Doctor and UNIT battle to keep both Martha and Donna alive.

As the shadows of war loom on the planet Messaline, the Doctor meets the most important woman of his life...

In 1926, Agatha Christie disappeared for ten days. Was a giant alien wasp to blame?

The Doctor meets River Song for the first time as he and Donna face the Vashta Nerada!

As the shadows rise, the Doctor forges an alliance with the mysterious River Song. But can they halt the advance of the Vashta Nerada?

Vacation plans go awry for the Doctor when he joins tourists on a flight over the crystalline planet Midnight, where the passengers encounter a malevolent force.

What would have happened if the Doctor had died facing the Racnoss? We find a nightmare world as Donna and Rose attempt to stop the approaching Darkness.

The Earth gets hijacked and relocated by a new Dalek empire, prompting the Doctor's allies--Rose Tyler, Sarah Jane Smith, Capt. Jack Harkness and Martha Jones--to band together while an old enemy lurks behind the scenes.

Season 4 concludes with the Doctor's companions making a last stand against Davros and the Daleks with the Doctor and the TARDIS both out of commission.