* MARY AND MARTHA. 8 p.m. Saturday, HBO.

Hilary Swank and Brenda

Blethyn star as mothers united by tragedy in this film from Richard Curtis ("Love Actually"). Not easy viewing - and I'd like to think we could care about malaria in the Third World without being made to first care about Western victims - but the message and performances are strong.

* REMEMBER SUNDAY. 9 p.m. Sunday, 6 ABC.

The line between Hallmark Hall of Fame presentations and the too often syrupy Hallmark Channel movies is getting blurrier, but some sweetness is OK in this film, starring Zachary Levi ("Chuck") and Alexis Bledel ("Gilmore Girls") as a couple challenged by the short-term memory loss that requires him to fall in love with her every time they meet. And, yes, he's probably also forgotten that Drew Barrymore had to do the same in "50 First Dates."

* ALL THE PRESIDENT'S MEN REVISITED. 8 p.m. Sunday, Discovery.

Robert Redford - with help from Carl Bernstein, Bob Woodward and many others - looks back at the scandal that led to his 1976 film "All the President's Men."

* THE BLETCHLEY CIRCLE. 10 p.m. Sunday, WHYY 12.

The British can't seem to get enough of the '50s. In this three-part series, four women who worked as codebreakers reunite after World War II to solve a series of killings.