Cassie Denny

 was Albie Sinclair's landlady. She took Helen Sinclair's necklace as a deposit for a room in 1963. She snooped in Albie's room due to her homophobic views after reading the love letters between Albie and Trev Bailey and called the police on them.

In 2025, she still had the necklace when the Eighth Doctor and Liv Chenka. She was taken by a Weeping Angel. (AUDIO: Albie's Angels)