Very interesting story of the past trying to prove the existence of titans and using a machine to go into the hollow earth. Then you got a group of kids trying to solve the mystery of their father who has not been seen since G day and peicing together a map of the gamma ray holes to find him and later to stop shaw from closing the holes with monarch. They've woven these two parts of the stories together when Kate, may, and shaw who has been there before fell into the hollow earth to later find Keiko who they thought she was dead since she was there earlier. Finally they used that same machine that shaw was in to go into the hollow earth to get out of their. I found this story telling is very efficient.This is the only show that I care about the characters because it has good drama and character development. I also like seeing new monsters in this series which is pretty neat. They could've done some more work with the fight at the end and stop using new characters through out the franchise but this is so far a really underrated series.