Wow, Guy can be a real downer. But no wonder. Not only have his dreams as an inventor been dashed, he and Sam are forced to spend the night in a junkyard in a deep pit. Not even his inventing skills will help him because everything he makes blows up, so he's particularly pessimistic.
EB and Michellee arrive at a bed and breakfast and of course Michellee's overprotectiveness causes EB to get bored.
'Dark' has a few moments worthy of its title as Sam almost gets them killed, and Guy reveals his dark and troubled past. We also learn about the Chickeraffe's: it was stolen from its mother by poachers. Sam begins to tell his story and although he gets interrupted, his story is the most tragic of all.
That said, 'Dark' is absolutely hilarious. With Guy's deadpan wit and Sam's goofiness, they make a classic pair.
Ultimately it's Sam who saves the day this time around, which shows that optimism has true value in it. And whereas Sam and Guy's need to stay together seemed a little contrived in the last episode, here the friendship they're forming feels genuine and natural. Either this episode or 'Box' is the most 'Planes, Trains and Automobiles' of the series.