I remember seeing this in reruns in England when I was around 5 (about 1964). The episode I remember best was about a man, I think he was a professor, who was transporting a deadly snake on a passenger liner. The snake somehow breaks loose and could be anywhere on the ship. They finally find it and the professor subdues it by tying a cloth soaked in ether around a cane and using that to knock the snake out. In another I remember a man in a wheelchair was trapped in a fire. I seem to vaguely remember that he used a ham radio to save himself. I don't remember that episode all that well though. I do remember the series as being a real nail biter though. Wish they'd rerun it or make it available on video.