When Krypton exploded, its smaller neighbor planet, Argos, was thrown out of its rotation and sent flying into space. Fortunately Argos's top scientist convinced the people of' Argos that Krypton's destruction was at hand, and together they managed to construct a force field that maintained the gravity and atmosphere of their planet. For sixteen years the residents of Argos survived. In time Argos's force field began to fail, and, sensing the end of their world, the scientist placed her family in cryo-tubes to preserve them until help could arrive. Kara, however, was the only one to survive. Clark was delighted to know there had been another survivor of the Krypton system.
Superman introduced Kara to his adoptive parents who took her in and are now helping her adjust to life on Earth. (In order to blend in, Kara has taken the last name Kent and Jonathan and Martha explain that she is a niece on Jonathan's side of the family.)
Inspired by her "cousin" Clark, Kara has made a costume similar to Superman's and occasionally joins on missions as Supergirl. Kara frequently visits Clark in Metropolis and, as Supergirl, she has full access to Superman's Fortress of Solitude.
Because Argosians and Kryptonians sprang from a common humanoid ancestor millions of years before, Supergirl's powers closely parallel Superman's.
As a result, Supergirl has powers that are similar to Superman's (flight, strength, heat vision, super-hearing), but is more resistant to Kryptonite. (Exposure to the radioactive element would kill Superman in about twenty minutes but Supergirl could hold out for several hours.) Also, because Supergirl is nearly half Superman's age (16), her powers are not quite as strong as his. She more than makes up for this in attitude, which is cocky, hip and very independent. With Supergirl, Superman has a living link to his alien heritage, and someone he can talk to about his dual lives as Superman and Clark Kent. She is a frequent friendly ally who can be trusted with Superman's secret.
Supergirl Episode Appearances
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