Joan Sanderson

English comic player known for her bossy roles in British TV series including "Please Sir!," "Me and My Girl" and "After Henry." Sanderson worked mostly on TV and on the British stage, with occasional small film roles in "The Great Muppet Caper" (1981) and Stephen Frears' "Prick Up Your Ears" (1987).

WIKIPEDIA

PARTNERS IN CRIME · S1, E3

The House of Lurking Death

The young new mistress of Thurley Grange fears someone in the house is trying to kill her. Tommy and Tuppence are hired to investigate, though death does indeed visit the grim old house. The detectives are left to find the culprit from an array of unlikely suspects.
UPSTAIRS, DOWNSTAIRS · S5, E14

Noblesse Oblige

Summer 1929. Georgina and Robert want to marry. His parents agree, with a catch: the pair must not see each other for a time. Downstairs, Mrs. Bridges and Ruby are at odds.