On 18 August 1951, Eddie and Barbara Smith, companion Sarah Jane Smith's parents, were killed in a car accident after attending the Foxgrove Village Fête. Luke Smith called this a fixed point in time. The Trickster, in an attempt to gain a physical presence on Earth, opened a time fissure between then and Ealing, 2009, and tempted Sarah Jane into entering it. She initially broke her parents' car with her sonic lipstick to prevent their deaths, but after the Trickster broke free, she fixed it, and her parents — having figured out the truth about Sarah's identity — willingly drove off to their deaths, leaving behind a baby Sarah Jane. (TV: The Temptation of Sarah Jane Smith)
In 1922, Gerrard Lassiter was born. On what would have been his 22nd birthday in 1944, the Germans invaded Turelhampton, recovered an alien body from the Vvormak cruiser that had crashed there on 17 May, and left with the body frozen in a casket. Peter Spinney reported on these events to UNIT in 2001. (PROSE: The Shadow in the Glass)
In 1947, Umbreen became the first woman to be married in Pakistan as she married Prem at the India-Pakistan border the day after Pakistan was declared a nation. The Thirteenth Doctor officiated their wedding, which was also attended by Umbreen's future granddaughter, Yasmin Khan. The ceremony was a mix of Muslim and Hindu traditions.
As violence across India and Pakistan continued, Prem was killed at the hands of his own brother, and Umbreen and her mother fled to Lahore. Two Thijarians, Kisar and Almak, bore witness to Prem's death. (TV: Demons of the Punjab)