“That’s you, all over!” could be the tagline for the new head-scratcher “Orphan Black” (8 p.m. Saturday, BBC America). Part of a lineup of supernatural fare, including a new episode of “Doctor Who” (7 p.m. Saturday, BBC America), “Black” asks a lot of star Tatiana Maslany.
She’s first seen as Sarah, a punk runaway at a New York train station, who calls her foster brother (Jordan Gavaris, “Degrassi”) to announce that she’s back in town to reclaim her lost daughter and get rid of her deadbeat, drug dealer boyfriend. Moments later, she witnesses a rather posh woman collapse in sobs before throwing herself in front of an onrushing commuter train.
But just before the woman hits the tracks, Sarah catches a glance at her face and realizes that the suicide is her mirror image. A resourceful street kid, Sarah steals her handbag, wallet and personal effects, planning to leave her scruffy old life and assume the identity of her dead identical “twin.”
If this story line sounds familiar, it’s because it’s similar to the plot to “Ringer,” the canceled CW drama that starred Sarah Michelle Gellar. But “Black” gets much more complicated in a hurry.
Sarah soon discovers that the “nice” girl whose identity she’s stolen was actually involved in some complicated police business. Did that drive her to suicide? Or was it the presence of yet another double — or is that a triple?
‘‘Black” should have quit while Sarah was juggling with just one other life to lead. Once it sends in the clones, things stop making much sense and the drama begins to thin out.
Saturday’s other highlights
• The 2013 NCAA Basketball Tournament (3:20 p.m. and 5:55 p.m., CBS) continues.
• Just three years shy of 60 years old, the 1956 Cecil B. DeMille biblical epic “The Ten Commandments” (6 p.m., ABC) continues to attract a large TV audience.
• Isaiah Washington and Lamman Rucker portray rival ministers struggling with power and corruption in the 2012 drama “The Undershepherd” (7 p.m., TV One).
• Scheduled on “48 Hours” (9 p.m., CBS): A televangelist’s world is rocked by murder.
• With just $300 to spend and a set of wheels, host Justin Warner prowls Southern back roads in search of “Rebel Eats” (9 p.m., Food Network).