At first Henry's very neat cousin doesn't like the cookies from under his bed or Mudge's slobbery kisses, but when they all play frisbee, she begins to enjoy her visit.

In the autumn Henry and his big dog Mudge watch the leaves turn, meet with some Halloween spooks, and share Thanksgiving dinner.

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.

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

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.