Lilly tries to resurrect Walter after he meets an unfortunate end, but epically fails.
Lilly is overjoyed that Walter is Not Quite Dead, except... why are his eyes different? Oh no! It's Emperor Evulz using his Shapeshifting to pretend to be Walter!
Alternatively, Walter seems to be dead, only to turn out alive... and then he dies anyway.
Then the real Walter appears and beats up the shapeshifted Evulz.
It turns out that it wasn't Walter who died, but a clone of him that was programmed to believe it was the original. Once he realizes what's going on, he creates a new, non-degenerated clone.
Parodied: Walter dies at the end of every episode, only to come back unharmed. He even has an intimate knowledge of five different afterlives because of it.
Zig Zagged: Walter survived the gun shot, but just barely, except it was poison tipped. However, Lilly administers the antidote just in time, allowing Walter to survive the poison... only for both to realize Walter has lost too much blood, as he dies in her arms.