When Henry's cousin Annie prepares to move in next door, he and Mudge help calm her fears.

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

Henry and his big dog Mudge celebrate Henry's birthday with a pi~nata, a lively birthday party, and a cake shaped like a fish tank, making May first the best day ever.

Henry's family takes in a stray cat, the ugliest cat they have ever seen, and an amazing relationship blossoms between it and their big dog Mudge.

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.

While Henry's parents are at a Sweetheart Dance on Valentine's Day, he and his dog Mudge have a wonderful time staying at Mrs. Hopper's house, where they enjoy tea and music and dressing up in various costumes.

Henry and his dog Mudge are invited to a sleepover in Patrick's attic, where they watch monster movies, eat pizza, and enjoy a contest to determine whose dog is the best popcorn catcher.

Henry, his dog Mudge, and his father enter a snowman-building contest at the local park and win third place.