Watch: Hilary Swank and Brenda Blethyn Battle Malaria in the Trailer for HBO's 'Mary and Martha'

This Sunday, HBO will premiere David Mamet's "Phil Spector," a fictionalized film about the real life trial of the infamous record producer starring Al Pacino and Helen Mirren that's been attracting controversy from the family of murdered actress Lana Clarkson. And on May 26th, the premium cable channel has an even higher profile feature slated to debut -- Steven Soderbergh's Liberace biopic "Behind the Candelabra," with Michael Douglas and Matt Damon.

HBO's other upcoming original film "Mary and Martha," which will air on Saturday, April 20th, isn't as contentious or sexy as its compatriots. Directed by Phillip Noyce ("Salt") and written by Richard Curtis ("Love Actually"), the drama stars Hilary Swank and Brenda Blethyn as a pair of women who lose their sons to malaria in Africa and who then team up to fight the disease. Cue the inspiration and uplift -- Curtis is no a stranger to using cinema to get a message across, as seen in his 2005 feature "The Girl in the Café" (also produced by HBO), which combined a May-December romance with a visit to the G8 summit. Check out the trailer for "Mary and Martha" below: