SERIES FINALE: This series never registered as much more than occasionally diverting action fare on a slow Friday TV night – but Melinda Clarke, as the ruthless trainer-turned-enemy of Maggie Q’s Nikita, certainly injected Nikita with bits of flair and fun. For tonight’s series finale, expect a womano y womano showdown, as Nikita finally confronts Clark’s Amanda face to face. Although, since Amanda has been dabbling with lookalike double agents of late, who knows whose face is real?