1973

January

 * 06 - The Three Doctors Episode 2 First Broadcast


 * 13 - The Three Doctors Episode 3 First Broadcast


 * 19 - Max Adrian, who played King Priam in "The Myth Makers," dies in Wilford.


 * 20 - The Three Doctors Episode 4 First Broadcast


 * 27 - Carnival of Monsters Episode 1 First Broadcast

February

 * 03 - Carnival of Monsters Episode 2 First Broadcast


 * 10 - Carnival of Monsters Episode 3 First Broadcast


 * 17 - Carnival of Monsters Episode 4 First Broadcast


 * 24 - Frontier in Space Episode 1 First Broadcast

March

 * 03 - Frontier in Space Episode 2 First Broadcast


 * 10 - Frontier in Space Episode 3 First Broadcast


 * 17 - Frontier in Space Episode 4 First Broadcast


 * 24 - Frontier in Space Episode 5 First Broadcast


 * 31 - Frontier in Space Episode 6 First Broadcast

April

 * 07 - Planet of the Daleks Episode 1 First Broadcast


 * 14 - Planet of the Daleks Episode 2 First Broadcast


 * 21 - Planet of the Daleks Episode 3 First Broadcast


 * 28 - Planet of the Daleks Episode 4 First Broadcast

May

 * 05 - Planet of the Daleks Episode 5 First Broadcast


 * 12 - Planet of the Daleks Episode 6 First Broadcast


 * 19 - The Green Death Episode 1 First Broadcast


 * 26 - The Green Death Episode 2 First Broadcast

June

 * 02 - The Green Death Episode 3 First Broadcast


 * 09 - The Green Death Episode 4 First Broadcast


 * 16 - The Green Death Episode 5 First Broadcast


 * 18 - Roger Delgado is killed in an automobile accident outside Neveshir, Turkey.


 * 23 - The Green Death Episode 6 First Broadcast

December

 * 15 - The Time Warrior Episode 1 First Broadcast


 * 22 - The Time Warrior Episode 2 First Broadcast


 * 29 - The Time Warrior Episode 3 First Broadcast

Unknown date

 * Peter Bathurst, who played Hensell in "The Power of the Daleks" and Chinn in "The Claws of Axos," dies.