although it suffers from a 'miraculous' ending [a] potentially intriguing tale of what happens when the Alphans travel through a time warp and meet a future version of themselves
(David Scott, DWB, 1992)
A fairly typical season one entry, inasmuch as something very surreal and fantastic is going on, the Alphans don't really understand it, the viewers don't really understand it, a good idea is turned into something painfully slow... but the music and direction are pleasing. Johnny Byrne's script once again demonstrates that whilst he is a first class ideas man, he has little concept of how to construct a workable narrative and has even more problems when trying to craft a dynamic film series. David Tomblin's imaginative direction barely saves this peculiar entry. Rating 5/10
(Anthony McKay, DWB, 1993)
...a beautifully sympathetic performance by Judy Geeson... The story's strength lies in its plotting; the mystery builds so well that one can almost forgive the occasional bad idea; for example that Regina has two brains!
(Richard Houldsworth, TV Zone, 1993)
A genuinely touching episode with fine performances from Nick Tate and Judy Geeson, and a beautifully played dual role for Barbara Bain as Helena's future self. The resolution is tosh, but it doesn't matter in the slightest. A+
(Chris Bentley, SFX 20, 1996)
This tantalising glimpse into a possible future is both fascinating and poignant. The real reason for the story's success is Barbara Bain's performance in her scene as both Dr Russell and her older, sadder counterpart. ...Thought provoking, emotionally involving and very mysterious.
(John Kenneth Muir, Exploring Space: 1999, p37-9)
Geeson is excellent in this downbeat tale of a woman who envisions disaster for Moonbase Alpha and her crew. *** (good)
(James O'Neill, Sci-Fi On Tape, p270, 1997)
This is the first truly perfect example of Space 1999, and the first episode I will rate a 10. In all regards- scripting, performances, special effects, sets, and the immensely imaginative and humanistic aspects- this episode shows a series which has found itself. It knows what it wants to express and what it wants to leave more vaguely to the imagination of the viewer. 10/10
(Bob Wood, The Future Is Fantastic, 2001)
An immensely entertaining story, but it's let down by a weak ending. 3/5
(Alasdair Stuart, SciFiNow #10, 2007)