Upstairs, Downstairs - Season 1 - Eps 5: A Suitable Marriage
December 1905: Elizabeth falls for a young German baron, whom her father is suspicious of. Richard quickly uncovers the Baron's secret, but as it turns out, Baron Klaus von Rimmer is hiding another secret, which Rose accidentally stumbles upon. The events of the evening compel one of the servants to betray not only the family, but the country as well.
About Upstairs, Downstairs

Title: Upstairs, Downstairs
First Air Date: 1971-10-10
Last Air Date: 1975-12-21
Status: Ended
Rating: 7.615/10 (from 26 votes)
Language: EN
Seasons: 6
Total Episodes: 68
Network: ITV1
Genres: Drama
Production Companies: LWT
Synopsis
Upstairs: the wealthy, aristocratic Bellamys. Downstairs: their loyal and lively servants. For nearly 30 years, they share a fashionable townhouse at 165 Eaton Place in London’s posh Belgravia neighborhood, surviving social change, political upheaval, scandals, and the horrors of the First World War.
Cast

Christopher Beeny
Edward Barnes

Gordon Jackson
Angus Hudson

Jacqueline Tong
Daisy Barnes

Jenny Tomasin
Ruby Finch

Angela Baddeley
Mrs. Bridges

David Langton
Richard Bellamy