The Molly Maguires (1970)

In the 1870s, undercover Pinkerton agent Richard Harris arrives in a Pennsylvania mining town to infiltrate the Molly Maguires, a group of Irish miners, led by Sean Connery, explosively protesting the actions of oppressive mine owners. It’s a solid film, portraying one example of an important part of labor history. Connery and Harris are appealing leads and have great chemistry as sometime allies and sometime foes.

Oscar Nomination: Best Art Direction-Set Decoration