The Krynoid unites the vegetables against the animal world. Tom Baker, Elisabeth Sladen. Chase: Tony Beckley. Scorby: John Challis. Krynoid's Voice: Mark Jones. Thackeray: Michael Barrington. Amelia Ducat: Sylvia Coleridge.

Scheduled for 120 minutes so not clear which episodes were included; with the following week just indicating a 30 minute slot it is possible this was the first five episodes!

Bat-like creatures are haunting a contemporary London school. While investigating, the Doctor runs into an old friend, Sarah Jane Smith (Elisabeth Sladen), who's already on the case.

The TARDIS is temporarily captured by the Mandragora Helix, a spiral of energy with a controlling influence, at the centre of which the ship is infiltrated by a sparkling ball of energy.

A fossilized hand is discovered in a quarry explosion. Tom Baker, Elisabeth Sladen. Zazzka: Roy Pattison. Abbott: David Purcell. Watson: Glyn Houston. Miss Jackson: Frances Pidgeon.

The Time Lords intercept the transmat beam taking the Doctor, Sarah and Harry back to Nerva and deposit them instead on the planet Skaro at an early point in its history. There a Time Lord gives the Doctor both a mission to prevent or alter the Daleks' development so that they become less of a threat to the universe and a time ring that will enable him and his companions to return to the TARDIS once this is done.

One morning in every city and town in the world, the human race wakes up to face the most surprising invasion yet. Everywhere, in every land, a forest has grown overnight and taken back the Earth. It doesn t take the Doctor long to discover that the final days of humanity have arrived...

The overlap between quantum reality and science fiction is discussed.

The tracer brings the TARDIS to the planet Tara. Romana finds the fourth segment disguised as part of a statue but is then taken prisoner by Count Grendel of Gracht. Grendel is plotting to seize the Taran throne from the rightful heir, Prince Reynart, and has mistaken Romana for an android duplicate of the Prince's betrothed, Princess Strella, to whom she bears a remarkable resemblance.

The Time Lords intercept the transmat beam taking the Doctor, Sarah and Harry back to Nerva and deposit them instead on the planet Skaro at an early point in its history. There a Time Lord gives the Doctor both a mission to prevent or alter the Daleks' development so that they become less of a threat to the universe and a time ring that will enable him and his companions to return to the TARDIS once this is done.

With a new weight-loss pill tested in London by Adipose Industries, the Doctor goes to investigate the sinister truth behind the product, only to find out that his former companion Donna Noble (Catherine Tate) is investigating as well. Together, they attempt to stop businesswoman Miss Foster (Sarah Lancashire) from killing thousands of people in London during the birth of the Adipose, short white ...

The Doctor and Donna land in Pompeii during the 79AD eruption of Mount Vesuvius. The Doctor's activities in Pompeii are impeded by the rock-like Pyrovile and their allies, the Sybilline Sisterhood, who are using the volcano to convert the humans to Pyroviles. The Doctor is faced with a moral dilemma: whether to rescue himself and all of Pompeii from the situation and leave the Pyroviles to have th...

An atomic-research center awakens a hibernating race of intelligent reptiles that release a deadly plague.

The Doctor and Clara crash land on the Moon to find a world of horror.

The Doctor and Donna arrive on the Ood-Sphere in the year 4126. They arrive at a factory where the Ood are prepared for sale to anyone willing to pay the price. When they find a group of unprocessed Ood, they become horrified at the alterations performed and resolve to free the Ood.

The Doctor gets a call from previous traveling companion, now medical officer at UNIT, Martha Jones (Freema Agyeman) with a request that he return to Earth immediately. She requests the Doctor's help in investigating ATMOS (Atmospheric Omission System) and why 52 people around the world all died simultaneously. The Doctor learns that the Sontarans are planning to take over the Earth. They take Mar...

Continuing from the end of "The Sontaran Stratagem", the Sontarans launch the attack with their poison gas slowly encircling the Earth. The Doctor—impeded by a Sontaran-controlled clone of Martha—aids UNIT in repelling the Sontarans in the ATMOS factory while Donna infiltrates the Sontarans' warship. He decides to try and burn the poison gas that now encircles the Earth and with the help of th...

The TARDIS, as seen before, seems to display a mind of its own and whisks the Doctor, Donna, and the Time Lord's former companion Martha Jones to the planet Messaline, in the midst of a savage war between humans and the fish-like Hath. Martha is abducted by the Hath shortly after the time travellers arrive. Rescuing Martha becomes the Doctor and Donna's main priority, as well as attempting to put ...

The Doctor and Donna travel to December 1926 and meet the renowned murder mystery writer Agatha Christie (Fenella Woolgar), who is attending a party at Lady Eddison's (Felicity Kendal) country manor. They investigate a jewel robbery perpetrated by the "Unicorn" (Robina Redmond, portrayed by Felicity Jones) and a spree of murders committed by an extraterrestrial wasp (Reverend Golightly, portrayed ...

In episode #204 of Science Goes to the Movies, series co-hosts Dr. Heather Berlin and Faith Salie are joined by Mukund Vengalattore, atomic physicist and Assistant Professor of Physics at Cornell University, to talk about quantum physics in the British sci-fi show, Doctor Who.