HEAT 1, SEASON 1: Where is Everybody? VS A World of His Own
 

Where is Everybody? for me - it just conveys desperation and confusion prefectly.

I think I'm going to go with A World of His Own with this one. It's one of the eps that I remember most from when I was a kid. Seems very obvious now, but it's still good fun.

This is a really tough choice, but I will have to go with Where Is Everybody? - just - because of the sheer sense of desperation. I just wish they'd gone with the ending in the story is that would have lifted it to a whole new level.