...attempts to exploit the theme of Logic versus Faith, but it's a fatal mistake to place the burden of Faith on Koenig. He's much too hard nosed a character to ever believe Arra's improbable tale. Helena Russell would have been a much better choice. 4/10
(Rob Pritchard, Dreamwatch #27, 1996)
Margaret Leighton's commanding presence and excellent performances from the cast lift a strange but otherwise unremarkable episode. B+
(Chris Bentley, SFX 20, 1996)
...explores the issues of faith and the limitations of the human mind. The adversary character interaction again provides for a great deal of suspense.
(John Kenneth Muir, Exploring Space: 1999, p57)
Veteran actress Leighton excels in this dreamy episode. **- (average)
(James O'Neill, Sci-Fi On Tape, p270, 1997)
Viewers are immediately struck by Landau's emotionally charged performance, which is often considered one his finest in the series. [Leighton's] performance stands out as one of the most powerful and dignified guest appearances throughout the series. She captures and conveys the ageless wisdom, as well as the contrast of fragility with great strength, which are intrinsic to the character of Arra. Collision Course clearly and successfully presents the kind of metaphysical thinking which significantly sets Space 1999 apart from other mainstream televised science fiction shows. 10/10
(Bob Wood, The Future Is Fantastic, 2001)
Carter's always good value but this plot isn't anything to write home about. 3/5
(Alasdair Stuart, SciFiNow #10, 2007)