"Disillusion" is the seventh episode of the fifth and final series of the period drama Upstairs, Downstairs.

Disillusion was recorded in the studio on 3 and 4 April 1975, and was the final appearance of Karen Dotrice as Lily Hawkins.

Hudson explains to Mrs Bridges that Lily brings him hope and joy, and he tells Virginia that he has "very deep feelings" for her.

On Sunday morning, having spoken to Georgina, Lily talks to Hudson, and deliberately hurts him by saying insulting things about him.

She leaves a note for Mr Hudson, explaining she did not mean the hurtful things she said the day before; she had only wanted to stop him caring for her.