Finding Your Roots With Henry Louis Gates Jr. Sunday, 8 p.m., Channel 2
Building on his previous ancestral-exploration series like “African American Lives,’’ the venerable Harvard prof sets his sights on pairs of famous folks whose roots crisscross in their family trees, often unbeknownst to them. Well-known actors, artists, politicians, musicians, and others dig for answers behind their notable names with the help of DNA experts, geneticists, and genealogists. Those game to look back include Harry Connick Jr., Branford Marsalis, Kevin Bacon, Kyra Sedgwick, Barbara Walters, Condoleezza Rice, Samuel L. Jackson, and Robert Downey Jr.
Mad Men Sunday, 6 a.m., AMC
If you can’t remember what Don Draper and the gang were up to at the end of last season, AMC is offering a refresher course tomorrow morning, airing the final three episodes back to back. So get up early or set your DVR and prep yourself for tomorrow night’s long-awaited season five premiere.
Q’ Viva! The Chosen Saturday, 8 p.m., Channel 25
J-Lo and Marc Anthony bring the hopefuls back to LA for the next round of cuts.
Frozen Planet Sunday, 8 p.m., Discovery
It’s summer at the ends of the earth.
The Celebrity Apprentice Sunday, 9 p.m., Channel 7
A round of mocktails for all their mock friends.