Pamela Stephenson is the token guest star, but is required to do little more than look pasty faced and whimper occasionally.
(Richard Houldsworth, TV Zone, 1993)
...a story worth watching if just for the brevity of Martin Landau's appearance on the screen. The acting is acceptable, the plot has a few twists and turns to keep it interesting and the guest stars and secondary characters are given a decent percentage of the lines for a change. 7/10
(Anthony McKay, DWB, 1994)
One of Year Two's most literate episodes which comes close to recapturing the spirit of Year One despite some dumb dialogue. B+
(Chris Bentley, SFX 20, 1996)
This is it. Inarguably the worst episode of Space 1999, Catacombs of the Moon is a disastrous stinker on every level imaginable. There are so many unanswered questions of motive for both Patrick Osgood and the firestorm that this episode just falls apart. It is truly the nadir of the series, without even good special effects to render it watchable.
(John Kenneth Muir, Exploring Space: 1999, p127-128).
The joy is that everybody gets to sink their acting teeth into a script that contains a wealth of edgy dialogue exchanges, and it is an opportunity the actors clearly took advantage of. Catacombs of the Moon is a very strong episode, only made more appealing and unique within the realm of Year Two by these suggestions that a Mysterious Unknown Force may have been at work. 8.5/10
(Bob Wood, The Future Is Fantastic, 2001)