‘TRUE BLOOD’: Sam Trammell, Ryan Kwanten, Anna Paquin, Joe Manganiello and Chris Bauer are back for the seventh and final season of the vampire drama. (Tony Rivetti/HBO)

FINALE WATCH: With Kira’s life now in the Dyad’s hands, “Orphan Black” (BBC America at 9 p.m. Saturday) concludes Season 2 with Sarah resisting Rachel’s ploy and the Clone Club uniting to gain freedom from the institute.

SERIES PREMIERE: The mockumentary series “Almost Royal” (BBC America at 10) centers on Georgie and his sister Poppy — two very sheltered, very spoiled heirs to a British estate who agree to let a TV camera crew follow them on their first trip to the United States.

Sunday talk shows: “Platts Energy Week” (WUSA at 8 a.m.) interviews the Energy Department’s Randa Fahmy Hudome; “BioCentury This Week” (WUSA at 8:30) features the University of Pennsylvania’s Paul Offit; “Fox News Sunday” (Fox at 9) hosts Rep. Kevin McCarthy (R-Calif.); “White House Chronicle” (WETA at 9) has the Creators Syndicate’s Froma Harrop; “State of the Union” (CNN at 9) features Sen. Rand Paul (R-Ky.).

“Government Matters” (WJLA at 9:30) hosts the Bureau of Alcohol, Tobacco, Firearms and Explosives’s Rick Holgate; “Newsmakers” (C-SPAN at 10) talks to Rep. Debbie Wasserman Schultz (D-Fla.); “Sunday Morning Futures With Maria Bartiromo” (Fox News Channel at 10) hosts Rep. Peter T. King (R-N.Y.); “This Is America & the World” (WETA at 10 and WHUT at 6 p.m.) talks to Japanese minister of education Hakubun Shimomura; “Face the Nation” (CBS at 10:30) talks to Sen. Marco Rubio (R-Fla.).

Sunday night, the documentary special “Secrets of Underground London” (MPT at 8 p.m.) unearths the ancient caves, preserved Roman remains, mysterious rivers and plague pits that lie beneath the streets of London.

SERIES PREMIERE: “Rising Star” (ABC at 9) reinvents the traditional singing competition. For the first time, the audience has the final say in real time, with viewers voting via an app to determine whether the singer will advance in the competition. Josh Groban hosts, and Brad Paisley, Kesha and Ludacris serve as mentors.

SERIES PREMIERE: The latest Michael Bay-produced vehicle “The Last Ship” (TNT at 9) centers on a Navy ship that is still functioning, staffed and on-call after a worldwide catastrophe.

RETURNING SHOW: “True Blood” (HBO at 9) opens its seventh and final season with rogue H-vamps looking to make Bon Temps their prey and Sookie in search of refuge from a dangerous accusation.

Rachel Lubitz