Superman and Batman try to outsmart their Bizarro duplicates, while Tommy Tomorrow and his "buddy" Brent ignore every rational protocol while exploring a planetoid!
In which we discover that Haunted Tank stories would work just as well - better, perhaps - without the haunted part. Also, metaphorically speaking,...
Element Girl - dead! Sapphire - jilted at the altar! And Earth - under attack by a fleet of UFOs! It's all right here...