T.D. ponders the age-old question: what’s more powerful, a bulldozer or a dinosaur? The kids can’t come to an agreement, so T.D. uses a time machine to bring a dinosaur back from the late Cretaceous period. / The Wagstaff Dogs are tired of losing every game. In their search for new leadership, the gang is shocked to discover a fanatical football coach in...Carolina?

Martha gets mixed up with another dog named Martha.

The vet says Martha needs to lose weight.

Martha recounts the tale of how T.D. first found Skits, and we learn that innocent, easy-going Skits may in fact have been a time-traveling puppy!

The Museum's fossil exhibit is closing and Milo and Truman are devestated.

Martha is hit with a stark realization: the Tooth Fairy doesn't like dogs. Determined to right a wrong, Martha and Skits bound boldly into the night as the Puppy Tooth Fairies.

It's impossible. It's unthinkable. It's unbearable. Helen is leaving Martha and going to art camp.

Marth feels it's high time to get a puppy, but the family disagrees. Martha decides to do what any dog would: train a baby to become a puppy.

Heroic Helen is on the hunt for trouble when she notices T.D.'s grades have suddenly improved. Has she uncovered a cheating scandal?