1931

June

 * Thomas Campbell Brockless, the father of Tommy Brockless, died of a heart attack at the age of 57. (TW: To the Last Man)

Unknown dates

 * Monarch's ship began to receive radio signals from Earth. (DW: Four to Doomsday)
 * The Master operated as a gangster in Chicago, but his plan was unknowingly defeated by the Fourth Doctor. (VD: The Duke of Dominoes)

January

 * 26 - Alfred Lynch was born.

February

 * 15 - Claire Bloom was born.

March

 * 1 - Neville Barber was born.
 * 15 - James Ellis was born.
 * 26 - George Raistrick was born.
 * 29 - Peter Russell, who played Eldred in DW: The Time Meddler, was born.

April

 * 1 - George Baker was born.
 * 16 - Godfrey James was born.

May

 * 18 - John Fraser was born.

August

 * 25 - Bryan Mosley, aka Buddy Windrush, who played the prop man in DW: The Daleks' Master Plan and a pirate in DW: The Smugglers, was born in Leeds.
 * 25 - Peter Gilmore was born.
 * 31 - Dennis Tate, who played a Technix in DW: The Daleks' Master Plan, was born in Iowa.

Unknown date

 * Cy Town was born.
 * Frances Pidgeon was born.
 * John Collin was born.
 * Max Faulkner was born.