Cow and Chicken - Season 4 - Eps 2: Black Sheep of the Family
Cow and Chicken get a visit from their cousin, Black Sheep (who really is in both terms). While Mom and Dad run away, Cow and Chicken try to make Black Sheep feel at home, but when he compliments Flem and Earl in scientific terms, they assume that Black Sheep is a dangerous criminal. Cow tries to help Black Sheep, who everyone changes their minds about, after he saves a woman's life from a heart attack.
About Cow and Chicken

Title: Cow and Chicken
First Air Date: 1997-09-16
Last Air Date: 1999-08-13
Status: Ended
Rating: 7.09/10 (from 469 votes)
Language: EN
Seasons: 5
Total Episodes: 156
Network: Cartoon Network
Genres: Animation, Comedy, Kids
Production Companies: Hanna-Barbera Productions, Cartoon Network Studios, David Feiss Productions
Synopsis
Follows the surreal adventures of a cow, named Cow, and her chicken brother, named Chicken. They are often antagonized by "The Red Guy", who poses as various characters to scam them.
Cast

Charlie Adler
Cow / Chicken / The Red Guy / I.R. Baboon (voice)

Candi Milo
Mom (voice)

Dee Bradley Baker
Dad (voice)

Michael Dorn
I.M. Weasel (voice)