The reason a film such as this (low budget '50s or '60s sci-fi) is on many viewers favorites lists is not necessarily fond childhood memories or nostalgia - it's because it's well made. Of course, they had very little money for props and such, but the story is more inventive than 95% of the stuff that's released now or has been since the nineties; no, make that the eighties. Yes, I'm one of those guys who saw it 30 years ago as a kid on TV during a Saturday matinée slot or something; but I've seen it again within a couple of years ago and it's still quite entertaining. Here, the writers proposed a question, a 'what if?' question about time travel. What if certain people, a small group of scientists, accidentally invented a time travel device? What if they used it? (Again, accidentally). What if the device short-circuited too early? What if this, what if that - and so on, with inventive answers provided to each question. If you've never seen this picture, you're in for a treat - you'll be wondering what's the next answer every 5 to 10 minutes. This is a quality sorely lacking in most films today. Maybe all the good ideas have been used. The same concept was utilized a couple of years later in the short-lived "Time Tunnel" TV series, but that show lacked the wild turns of this sci-fi set up. Some of the further situations in this story of the future are a bit goofy, but I believe it's intentional. The ending, which I won't give away here, actually puts some pressure on the viewers to wrap their minds around. Watch for famous sci-fi fan & publisher Forrest J.Ackerman in a cameo. Whatta trip!