Millicent Trueblood (voiced by June Lockhart) was 101 years old when she died. She was born in the year 1885. Despite that, she appeared to be a woman in her 60s or 70s. Her age was an homage to 101 Dalmatians, which the show borrowed ideas from.
Millicent Trueblood was neither mentioned nor seen again for the remainder of the TV series.
This marks the debut of Puppy Power: a magical power possessed by people with pure hearts to communicate with animals. Not to be confused with Scrappy-Doo (a character from the Scooby-Doo franchise)'s trademark battle cry "Puppy Power!".
Up until the moment when Millicent Trueblood gave Cooler a jacket during Cooler's flashback, this is the first time Cooler is seen without a jacket. The second time was in the Star Pup, but this time, he has a heart-shaped birthmark of his back.