More info at IMDb about Captain Video.
The DuMont Television Network (also known as the DuMont Network, DuMont Television, simply DuMont/Du Mont, or (incorrectly) Dumont) was one of America’s pioneer commercial television networks, rivaling NBC and CBS for the distinction of being first overall in the United States. It was owned by Allen B. DuMont Laboratories, a television equipment and set manufacturer, and began operation on June 28, 1942. The Network shut down permanently August 6, 1956. Many of it’s shows have been lost due to lack recording equipment in that era.
Vulcan Stev's Database 