Send in the clones -- "Orphan Black," the Canadian sci-fi thriller starring Tatiana Maslany as a woman with 10clones and counting, returned for season 2 this weekend on BBC America (it airs Saturdays at 9 p.m.). Here are more shows, from "Patty Duke" to "The Dukes of Hazzard," that had us seeing double.
THE PATTY DUKE SHOW They laughed alike, they walked alike, at times they even talked alike, but a hot dog only made one of the identical cousins played by Duke lose control.
GILLIGAN'S ISLAND The castaways had a problem getting off this uncharted desert isle, but Gilligan's Russian spy look-alike, Mr. Howell's freeloader double and a plain Jane who becomes a dead ringer for Ginger had no trouble finding it.
BEWITCHED Elizabeth Montgomery was enchanting as Samantha, but she seemed to have even more fun when she was up to tricks as mischievous cousin Serena.
I DREAM OF JEANNIE As the naive Jeannie, Barbara Eden was every master's dream. As her evil twin (also named Jeannie), she was a nightmare.
THE BRADY BUNCH It's the story of a lovely lady named Florence Henderson, who not only played mom Carol Brady but her feisty grandma, whom the kids fixed up with crusty Grandpa Brady (Robert Reed, who also was dad Mike). In another episode, Ann B. Davis portrayed maid Alice and her Army sergeant cousin, Emma.
THE ODD COUPLE Tony Randall played three generations of the Unger family -- neatnik Felix; his optometrist dad, Morris; and his fastidious grandfather. Jack Klugman played the sloppy Oscar and his dad, speak-easy owner "Blinky" Madison.
THE DUKES OF HAZZARD Talking about going Hogg wild. In one episode, Sorrell Booke played corrupt Boss Hogg and his law-abiding twin, Abraham Lincoln Hogg.
DYNASTY Linda Evans pulled double duty in seasons 5 and 6 as Krystle Carrington and Rita, an actress who is transformed into a Krystle doppelgänger as part of scheming Sammy Jo's plan to claim her inheritance.
FAMILY MATTERS If playing uber-nerd Steve Urkel wasn't crazy enough, Jaleel White also donned a dress -- accessorized with the same geeky glasses -- as Urk's Southern cousin Myrtle Mae.
FRIENDS Lisa Kudrow was there for you as ditsy Phoebe and her flaky waitress sister, Ursula, a recurring role she also had on "Mad About You."