10 Times Batman And The Joker Saved Each Other

The son of Lois Lane and Lex Luthor (yes, you read that correctly), and the sole survivor of Earth-3, Alexander Luther is one bad hombre, unhinged in a way that not even his father can compete with. Arriving on Earth Prime, Luthor wastes no time is racking up the atrocities, actually killing Superboy as well as nearly fatally injuring Nightwing.

Batman, in his efforts to defeat Luthor, is forced to go to extreme lengths and is sent into a rage the likes of which we rarely see. However, just before Bats can pull the trigger - literally - on Lex Jr, the Joker arrives. It turns out that the Joker is a jealous lover, and has resented Luthor so completely and utterly occupying his great rival's attention for all of the past year.

The Ace of Knaves steps in, finishes the job with a headshot from his pistol, laughing maniacally and, once again, saving Bruce Wayne from his darkest impulses; from himself. We're starting to suspect that the Joker may feel some genuine deep seated affection for his mortal enemy, somewhere deep deep down in his cold swinging brick of a heart.