The Catacombs The Continuity Guide
Moonbase Guide
by Martin Willey

Travel Tube

Breakaway Breakaway Black Sun

Travel tubes provide rapid transit between sections of the base and to the launch pads. The travel tube is evidently not a vacuum, as the creatures in Space Warp and The Beta Cloud use it without causing decompression.

In Year 1 there are six seats (the Toga chair); in Year 2 there are four.

Access to and from corridors is via the double side doors. Access to spaceships on the launch pad is through the end door (which has straight sides on the set and angled on the model). This opens into the Boarding Tube.

The opposite end of the travel unit has no interior door. Instead, there is a communications panel with two black and white screens. Externally, we never see an end without a door. Arguably this is a continuity mistake in many episodes, but we can presume that the travel unit has a symmetrical outer shell for ease of manufacturing, and one door is non-functional when the interior is fitted.

When travelling, the forward side is illuminated with white light; the rear side with red light.

Breakaway Breakaway Breakaway
Black Sun

In Year 1 the unit features 6 seats.

The Seance Spectre

The slightly modified Year 2 version. Note the set has shrunk- along the side walls there were 3 white panels, now there are only 2.

Space Warp

Year 2 configuration, with 4 seats.


The end door has straight sides, unlike the exterior shots of the travel tube unit.

Black Sun

Close-up of the control panel (year 1 version).

The Beta Cloud

The Year 2 version, with some additional switches and signage.

The Seance Spectre

A close up of the year 2 panel.

Seed Of Destruction

Another view of the cargo end of the travel unit.

The Beta Cloud

The door control panel is on the inside frame of the door.


View showing the travel tube network graphic.


Year One door signage.

The Seance Spectre

A view from the door. Note the buttons in the foreground.

The Seance Spectre

Appearing in The Seance Spectre are two buttons by the door. The top green one is "Re-start" (white text on red), the lower red button is "Emergency Stop" (red text on white). Note the inner side of the door has labels, including the number "2"

Copyright Martin Willey