The Dauphin's widow weds a lord and is executed for plotting against the queen.

Fay Compton
as Mary Stuart

Gerald Ames
as Bothwell

Ivan Samson
as Lord Dudley

John Stuart
as George Douglas

Ellen Compton
as Queen Elizabeth

Lionel d'Aragon
as Moray

Harvey Braban
as Ruthven

Irene Rooke
as Catherine de Medici

Donald Macardle
as Francis II

René Maupré
as Rizzio