S20:É01 - S20:E01 - Arc of Infinity (Pt. 1)
The Doctor and Nyssa trace something odd to Amsterdam...
S20:É02 - S20:E02 - Arc of Infinity (Pt. 2)
Commander Maxil doesn't believe the Doctor is innocent.
S20:É03 - S20:E03 - Arc of Infinity (Pt. 3)
Within the Matrix, the Doctor unmasks Omega and realises the threat is far from over...
S20:É04 - S20:E04 - Arc of Infinity (Pt. 4)
Omega has been reborn but as a walking anti-matter bomb.
S20:É05 - S20:E05 - Snakedance (Pt. 1)
The Mara is returning home, to the planet Manussa, five hundred years after being exiled.
S20:É06 - S20:E06 - Snakedance (Pt. 2)
Tegan tries to rid her mind of the Mara forever.
S20:É07 - S20:E07 - Snakedance (Pt. 3)
The Doctor locates the Great Mind's Eye crystal but it is instrumental in the Mara's plan.
S20:É08 - S20:E08 - Snakedance (Pt. 4)
The Doctor and the original snakedancer Dojeen work to rid the planet of the Mara.
S20:É09 - S20:E09 - Mawdryn Undead (Pt. 1)
Caught in a warp ellipse, the TARDIS is drawn to a huge spacecraft.
S20:É10 - S20:E10 - Mawdryn Undead (Pt. 2)
At Brendon School, the Doctor enlists the help of the Brigadier.
S20:É11 - S20:E11 - Mawdryn Undead (Pt. 3)
Mawdryn and his eternal mutants are awake and reveal the truth.
S20:É12 - S20:E12 - Mawdryn Undead (Pt. 4)
The Doctor’s ethics are challenged and the two Brigadier's finally meet.
S20:É13 - S20:E13 - Terminus (Pt. 1)
Turlough sabotages the TARDIS causing it to fuse with the space station Terminus.
S20:É14 - S20:E14 - Terminus (Pt. 2)
Bor solves the mystery at the heart of Terminus itself.
S20:É15 - S20:E15 - Terminus (Pt. 3)
The Doctor finds the pilot of Terminus and realizes a mistake is about to be made.
S20:É16 - S20:E16 - Terminus (Pt. 4)
The Garm and the pirates stop Terminus setting off a second Big Bang.
S20:É17 - S20:E17 - Enlightenment (Pt. 1)
The Doctor receives a dire warning from the White Guardian.
S20:É18 - S20:E18 - Enlightenment (Pt. 2)
The Doctor realizes that Striker is an Eternal and that the crew mean nothing to him.
S20:É19 - S20:E19 - Enlightenment (Pt. 3)
During an Eternals party, Captain Wrack places a bomb aboard Striker's ship.
S20:É20 - S20:E20 - Enlightenment (Pt. 4)
Turlough must make a decision and the Doctor and Tegan are unable to help him.
S20:É21 - S20:E21 - The King's Demons (Pt. 1)
At a medieval joust, the TARDIS appears.
S20:É22 - S20:E22 - The King's Demons (Pt. 2)
The Master and the Doctor fight for control over Kamelion’s mind.
S20:É23 - S20:E23 - The Five Doctors (Pt. 1)
Someone is stealing the Doctor's past incarnations from the timestream.
S20:É24 - S20:E24 - The Five Doctors (Pt. 2)
The Doctors face the dangers of the Death Zone.
S20:É25 - S20:E25 - The Five Doctors (Pt. 3)
Is there a traitor amongst the High Council - and what is the secret of Rassilon?
S20:É26 - S20:E26 - The Five Doctors (Pt. 4)
The Doctors confront the traitor in Rassilon's Tomb.