Northern Lights (1978)

In rural North Dakota during World War I, a struggling farmer decides to become an activist for the burgeoning Nonpartisan League, a labor union attempting to organize the region's farmers against the railroads and banks which are consistently undercutting their livelihood with unfair payments.

From memory: Great committed independent production with beautiful b&w cinematography illustrates a lesser-known historical political struggle.

Maltin**1/2: "Incisive, unforgettable Americana..." 

Apple Tree Yard (2017)

An eminent scientist caught up in a damaging and compromising lie.

4-part TV mini-series has some excellent performances, but presents itself like a crime mystery artificially drawn into length.

The Robber Bride (2007) (TV)

Journalist and seductress Zenia Arden has disappeared, and when her finger turns up on the shores of Lake Ontario -- next to her blood-soaked car -- the police believe they've uncovered a homicide.

Although the novel's original plot has been altered into an (intriguing) crime mystery with a twist ending, the ambiguities of the main character have been retained; the result is an intelligently made,  complex TV drama with a competent ensemble.