To those who are familiar with "Sapphire and Steel" (the UK series from late '70s-early '80s) which starred David McCallum and Joanna Lumley, the two appeared as extra-dimensional beings assigned to repair the fabric of time and set events on proper course on earth. It is ironic that McCallum in his role as Tone Hobart figured out how to "tilt time". In Assignment Three of "Sapphire and Steel", Steel commented that no one should be "... messing around with time ..." but Sapphire and himself.