Finding Your Roots

“Finding Your Roots” with Dr. Henry Louis Gates, Jr. is back tonight for a fifth season of 10 episodes on PBS.

In this first episode Dr Gates helps actor Andy Samberg and author George R. R. Martin (“Games of Thrones”) answer some family mysteries when DNA detective work uncovers new branches of their family trees. The DNA analysis upends family history and reveals new relatives.

In Rochester the episode is on channel WXXI at 8 p.m. In other areas check your local listing as PBS don’t have to follow the PBS schedule.