It was based on the comic strip Brick Bradford, which was created by Clarence Gray and William Ritt.

Brick Bradford is assigned by the government to aid Doctor Gregor Tymak, scientist and inventor who is working on an "Interceptor Ray" that can destroy incoming rockets.

Tymak uses his door into the fifth dimension to escape criminals and it takes him to the far side of the Moon (which luckily has air and is a rocky terrain without craters).

The action moves to the Moon as the ray requires a special element called Lunarium (with an atomic mass of 200) previously only found in a meteorite.

Hoerl's middle segment is full of in-jokes at the serial's expense while the final section by Clay is boring with a constant repetition of capture and escape sequences.