



| Anyone famous in it? | Dean Jagger - American character actor, starred in Bad Day at Black Rock (1955) and Firecreek (1968) |
| Directed by anyone interesting? | Little known British director Leslie Norman. |
| Is it scary? | There several good, tense scenes. |
| Any violence/gore? | Several off-camera deaths, with some rather graphic melting people. |
| Any sex? | None. |
| Who is it for? |
Fans of B-picture sci-fi/horror films should enjoy this solid entry. |
| Good Soundtrack? | A strong, mood enhancing soundtrack from Hammer regular James Bernard. |
| Visuals | Original Aspect Ratio - 1.33:1 fullscreen. Black and White. The print is strong, with good detail and a little print damage. Quite grainy. |
| Audio | English language mono. Mostly fine. |
| Subtitles | None. |
| Run-time | Feature: 1hr 16m 34s (PAL) |
| Extras | The disc includes:
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| Availability | Available as a single-disc release or in the Hammer Horror: The Early Classics boxset. Both include the booklet. Was also available in a dual-pack with The Abominable Snowman. |
| Region | Region 2 (UK, Europe) - PAL |
| Other regions? | Anchor Bay US DVD and E-M-S German R2 DVD (title XX Unbekannt), neither includes audio commentary or interview. |
| Cuts? | None known. |