"Twilight" or "The Secret File of the Meowing Mummies" - S1.E9

Catastrophe has stolen the Eye of Osirus and the Staff of Pharfigruttentuttenruttenschnarfen to reanimate cat mummies to do his evil bidding. He plans to awaken Cleopatra's cat with the help of Bast so he can rule with her for all eternity. The Spy Dogs must go up against the millions of cat mummies and stop Catastrophe.