Henry's and his big dog Mudge's boring weekend becomes interesting when Mom suggests building a castle in the basement.

Henry, his dog Mudge, and his parents go on a quiet camping trip to Big Bear Lake, enjoying the clean smell of trees and wonderful green dreams.

Mudge looks forward to the Mother's Day surprise that Henry and his father cook up for Henry's mother.

Henry is excited when his Uncle Jake builds him a tree house but worries that his dog Mudge will not be able to enjoy it with him.

When Henry and his dog Mudge go with Henry's parents to visit Great-Grandpa Bill in the home with lots of other grandpas, they lead them all on a wonderful adventure.