jacquie (United Kingdom) (2018/12/26): Identical twins, Melina and Gillian Lloyd haven't considered switching places since childhood. So when Melina proposes that Gillian take her place as a media escort to NASA astronaught Col "Chief" Hart, she refuses ... at first. The following morning Melina receives terrible news: her sister has been brutally murdered - and Chief, though innocent, is the prime suspect. He and Melina are determined to find the killer, a megalomaniac whose horrific schemes require Gillian's replacement, her identical twin - Melina.