Man's best friend is not himself. I'd stick with the dog as this episode clearly points out.

These scientists should be ashamed of themselves. Not only did they sexually exploit poor Alan Leighton (Professor Leighton?) in their terribly creepy atmospheric chamber, they totally ripped off Ozymandias' super science scheme! Not only do they molest the laws of God and Man (and a man) but they are plagiarists,too!
If only they would have used their time machine for good instead of evil....If you seriously mistook me for one of the Internet's greatest common foes, the Troll or the Clueless Poster,then maybe this plot could have panned out,after all.There are a few major take away lessons here:1. One must be willing to give up everything, be it love or life,to do what one thinks is right, even if the world would see it as wrong.2. There is no perfect solution,no matter how elaborate attempts at said non-existent perfect solution are.3. Even the best laid plans made by the smartest men on Earth can be ruined by a single Redneck with a shotgun (unless they are on Dragon Ball Z's version of Earth).

And indeed, the enemies are ourselves.

While there were some practical issues here (for instance, why only one 'monster', and one that could be killed so easily), the episode should be viewed as a human tragedy. What a great love story. I just watched it a second time, and I think it has to be seen more than once to fully appreciate. Remember that this was done during the Cold War. People were paranoid. Maybe we still are--nobody wants to see the true enemy, which is ourselves. We cause wars, we cause global warming, we cause pollution.