|"This One'll Kill You, Batman!"|
|First Published:||February 1975|
|Previous Issue:||Batman #259|
|Next Issue:||Batman #261|
"This One'll Kill You, Batman!"Edit
The Joker doses Batman with a drug that causes him to laugh uncontrollably at times of horror, thus incapacitating him in battle, and will kill him in 72 hours, and charges the Caped Crusader to keep him from murdering the one doctor who can save his life.