Dr. Claussen enlists the aid of Brick Bradford and his associates to protect the Interceptor Ray for the United Nations. The ray, invented by Dr. Tymak has the ability to destroy any missile that comes within the large area of the beam it emits. Laydron, a scientific criminal, is also interested in getting the ray in order to sell to a nasty foreign power. Brick and friend Sandy use Dr. Tymak's inventions such as the crystal door transporter to travel to the moon in order to get a mineral needed by the ray, and the Time Top which transports the two back into the 18th century to find a lost scientific secret buried away. The serial is fun no doubt with very original concepts. Its burden is that its separated into 3 different sections. The first 6 chapters concentrate on the moon adventure, the next 3 and a half have the Time Top (the best of the three), and the remaining chapters are back on present day earth and are unnecessary padding of the serial. Richmond is in the twilight of his acting career so the serial concentrates more on the supporting cast, but he still does have the adventurous presence. Vallin seems to have a ball playing Sandy, and much of his dialogue seems ad-libbed. (Brick and Sandy in the time travel sequence does have the feeling of a Hope-Crosby Road picture) I was surprised with Bennet directing there was a lack of good fight sequences. Rating, based on serials, 6.