Ellen Gray's weekend TV picks: 'True Detective,' 'Poldark,' Will Ferrell and Kristen Wiig do Lifetime

* TRUE DETECTIVE. 9 p.m. Sunday, HBO.

Temper your expectations for the show's new season, which carries nearly as much baggage as its characters. Sunday's Season 2 premiere introduces Colin Farrell, Vince Vaughn, Rachel McAdams and Taylor Kitsch as four people whose complicated lives won't be simplified by the murder of a corrupt southern California city's manager. Philly's David Morse guest stars.

* A DEADLY ADOPTION. 8 p.m. Saturday, Lifetime.

Are Kristen Wiig and Will Ferrell (pictured) parodying a Lifetime movie on Lifetime? Or are they - even more subversively - playing it straight? They want us to wonder.

* ORPHAN BLACK. 9 p.m. Saturday, BBC America.

Season 3 finale of the clone drama. As if fans need reminding.

* MASTERPIECE: POLDARK. 9 p.m. Sunday, WHYY12.

Aidan Turner and Eleanor Tomlinson star in a delicious remake of the romantic drama about a British soldier who returns home from American Revolution to reclaim his life in Cornwall. Subscription service Acorn TV, meanwhile, is streaming the much-loved '70s original, which can't match the new one for production values, but is still very watchable.

* BALLERS. 10 p.m. Sunday, HBO.

Dwayne Johnson ("San Andreas") plays an ex-football player under pressure to "monetize" his friendships as a financial adviser.

* THE BRINK. 10:30 p.m. Sunday, HBO.

Tim Robbins, Jack Black and Pablo Schreiber star in a wacky comedy set in the always hilarious world of U.S.-Pakistani relations. No, really.