January 20, 1979 at 6.25pm on BBC 1: Doctor Who – “The Armageddon Factor”

Last Adventure: The Power of Kroll

Next Adventure: Destiny of the Daleks

Season 16, Serial 6

In search of the final segment of the Key to Time, the TARDIS takes the Doctor, Romana and K-9 to the planet Atrios which is engaged in a war with its neighbouring planet, Zeos.

Find out more at the TARDIS Data Core.

Notable Cast

  • Tom Baker, “Doctor Who
  • Mary Tamm, “Romana”
  • John Leeson, Voice of “K9”
  • John Woodvine, “Marshal”
  • Lalla Ward, “Princess Astra”
  • William Squire, “The Shadow”
  • Barry Jackson, “Drax”
  • Valentine Dyall, “The Guardian”

Episodes

Find out more in the BBC’s Doctor Who episode guide.

Novelised as Doctor Who and the Armageddon Factor.

January 20, 1979: Doctor Who in “The Armageddon Factor”

Season 16 – “The Power of Kroll”

Season 17 – “Destiny of the Daleks”

In search of the final segment of the Key to Time, the TARDIS takes the Doctor, Romana and K-9 to the planet Atrios which is engaged in a war with its neighbouring planet, Zeos.

First broadcast January 20 – February 24, 1979 on BBC 1 at 6.25/6.20/6.30pm; six parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”/”Princess Strella”
  • John Leeson – Voice of “K9”
  • John Woodvine – “Marshal”
  • Lalla Ward – “Princess Astra”
  • Barry Jackson – “Drax”
  • Valentine Dyall – “The Guardian”
  • Bob Baker and Dave Martin – writers

Find out more

Novelised as Doctor Who and the Armageddon Factor

*The 20th Century in Sound & Vision is not responsible for these websites

December 30, 1978: Doctor Who in “The Power of Kroll”

In search of the fifth segment of the Key to Time, the Doctor and Romana arrive on the third moon of Delta Magna where Romana is captured by the native, green-skinned Swampies.

First broadcast December 30, 1978 on BBC 1 at 6.15/6.30/6.25pm; four parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”/”Princess Strella”
  • Neil McCarthy – “Thawn”
  • John Abineri – “Ranquin”
  • Philip Madoc – “Fenner”
  • Glyn Owen – “Rohm-Dutt”
  • John Leeson – “Dugeen”
  • Robert Holmes – writer

Find out more

Novelised as Doctor Who and the Power of Kroll

*The 20th Century in Sound & Vision is not responsible for these websites

November 25, 1978: Doctor Who in “The Androids of Tara”

Hunting the fourth segment of the Key to Time, the TARDIS lands on the planet Tara. Here, Count Grendel meets Romana and believes she is an android duplicate of Princess Strella.

First broadcast November 25 – December 16, 1978 on BBC 1 at 6.20pm; four parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”/”Princess Strella”
  • John Leeson – Voice of “K9”
  • Peter Jeffrey – “Count Grendel”
  • David Fisher – writer

Find out more

Novelised as Doctor Who and the Androids of Tara

*The 20th Century in Sound & Vision is not responsible for these websites

October 28, 1978: Doctor Who in “The Stones of Blood”

The tracer leads the TARDIS to planet Calufrax in search of the second segment of the Key to Time. However, the Doctor and Romana discover that they are on the planet Zanak.

First broadcast October 28 – November 18, 1978 on BBC 1 at 6.20pm; four parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”
  • John Leeson – Voice of “K9”
  • Nicholas McArdle – “De Vries”
  • David Fisher – writer

Find out more

Novelised as Doctor Who and the Stones of Blood

*The 20th Century in Sound & Vision is not responsible for these websites

September 30, 1978: Doctor Who in “The Pirate Planet”

The tracer leads the TARDIS to planet Calufrax in search of the second segment of the Key to Time. However, the Doctor and Romana discover that they are on the planet Zanak.

First broadcast September 30 – October 21, 1978 on BBC 1 at 6.20pm; four parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”
  • John Leeson – Voice of “K9”
  • Bruce Purchase – “The Captain”
  • Andrew Robertson – “Mr Fibuli”
  • Douglas Adams – writer

Find out more

Novelised as The Pirate Planet

*The 20th Century in Sound & Vision is not responsible for these websites

September 2, 1978: Doctor Who in “The Ribos Operation”

Season 15 – “The Invasion of Time”

Season 16 – “The Pirate Planet”

To restore the balance of the cosmos, the White Guardian requires the Key to Time, but it has been broken into six disguised segments and scattered throughout time and space.

First broadcast September 2 – 23, 1978 on BBC 1 at 5.45/6.20pm; four parts

Notable Cast & Crew

  • Tom Baker – “Doctor Who”
  • Mary Tamm – “Romana”
  • John Leeson – Voice of “K9”
  • Cyril Luckham – “Guardian”
  • Iain Cuthbertson – “Garron”
  • Prentis Hancock – “Shrieve Captain”
  • Robert Holmes – writer

Find out more

Novelised as Doctor Who and the Ribos Operation

*The 20th Century in Sound & Vision is not responsible for these websites