The Powerpuff Girls - Season 4 - Eps 9: Knock It Off
The Professor's old buddy and roommate from college Dick Hardly comes for a visit. When he sees the Powerpuff Girls he comes up with a scheme to make more of them and sell them as a security system.
About The Powerpuff Girls

Title: The Powerpuff Girls
First Air Date: 1998-11-18
Last Air Date: 2005-03-25
Status: Ended
Rating: 7.5/10 (from 909 votes)
Language: EN
Seasons: 7
Total Episodes: 136
Network: Cartoon Network
Genres: Action & Adventure, Animation, Comedy, Kids, Family
Production Companies: Cartoon Network Studios, Hanna-Barbera Productions
Synopsis
The Powerpuff Girls is a animated television series about Blossom, Bubbles, and Buttercup, three kindergarten-aged girls with superpowers, as well as their "father", the brainy scientist Professor Utonium, who all live in the fictional city of Townsville, USA. The girls are frequently called upon by the town's childlike and naive mayor to help fight nearby criminals using their powers.
Cast

Cathy Cavadini
Blossom (voice)

Tara Strong
Bubbles (voice)

E. G. Daily
Buttercup (voice)

Tom Kenny
Mayor / Snake / Lil' Arturo / Narrator (voice)

Tom Kane
Professor Utonium / Him / Talking Dog (voice)

Roger L. Jackson
Mojo Jojo (voice)

Jennifer Martin
Ms. Sara Bellum (voice)

Jennifer Hale
Ms. Keane / Princess Morbucks / Sedusa (voice)

Jim Cummings
Fuzzy Lumpkins (voice)

Jeff Bennett
Ace / Grubber / Big Billy (voice)