It Came From Beyond

It Came From Beyond is the second half of the 6th episode of Season 9. It first aired on April 4, 2005 with Arthur Makes Waves.

Summary
Grandma Thora finds a stray dog named Killer. Killer is a ferocious dog that barks at and bites other people and pets. Grandma Thora finds out that Killer has been in and out of the pound several times and changes her mind after leaving Killer there. Killer rethinks her behavior toward others.

Trivia

 * Killer was a character in the original books.