The Rexx Files All Dogs Go to Heaven: The Series : Season 2 Episode 9

Anabelle tells Itchy and Charlie to guard a "crystal". Charlie and Itchy have been playing pranks. Charlie thinks he sees a UFO and tells Itchy. Itchy thinks it's just another prank, and leaves. Then the "aliens" come into Itchy and Charlie's home, and scare Charlie away. The "aliens" were actually Carface and Killer. When Charlie finds this out, he plots a scheme to get them back and the "crystal".