Friday’s original episode of “Vegas” (CBS) was bumped for coverage of the Boston Marathon bombing investigation, so the network airs it Saturday at 8 p.m.

Original movie “Mary and Martha” (HBO at 8) stars Hilary Swank and Brenda Blethyn as two mothers who help each other when both of their sons die of malaria.

“Spoiled Rotten Pets” (NatGeo Wild at 9) features the over-the-top lengths to which pet owners will go, such as a full-service spa for pigs.

Sunday afternoon, WETA airs “In My Lifetime” (at 5 p.m.) a film from Robert Frye, a former executive producer of “ABC World News Tonight.” The film looks at the history and continued threat of nuclear weapons in society.

“All the President’s Men Revisited” (Discovery at 8) — executive-produced by Robert Redford — looks back at the 1976 movie and interviews journalists Bob Woodward and Carl Bernstein, among many others in the news media.

Dog the Bounty Hunter lands a new show after being canceled by A&E last spring, as he and his wife are the title characters on “Dog and Beth: On the Hunt” (CMT at 8).

Smithsonian Channel airs the documentary “The King’s Skeleton: Richard III Revealed” (at 9), which shows the discovery of the monarch’s remains in a parking lot in England.

Alexis Bledel stars as a lonely waitress in the original movie “Remember Sunday” (ABC at 9). She falls for a quirky jewelry store clerk (Zachary Levi) with short-term memory loss.

“What Would Ryan Lochte Do?” (E! at 10) is an excellent question, and this reality show featuring the Olympic swimmer attempts to answer.

The first episode of three-part mystery series “The Bletchley Circle” (WETA and MPT at 10) follows three women with an uncanny ability to break codes.

— Emily Yahr