Detective Comics Vol. 1 (1937-2011; 2016-) #83

Plot

Endeavoring to lose some weight, Alfred goes on an exercise program at an out of the way place in the country. While he is gone, the Caped Crusaders face an evil doctor, who uses a certain potion that allows him to control the actions of people, and in the end, are saved by a mysterious "thin man" who knows their secret identities.