This entertaining documentary profiles John Wojtowicz, a convicted bank robber who was the basis for Al Pacino’s character in the classic film “Dog Day Afternoon.”, Profiling John Wojtowicz, a convicted bank robber who was the basis for Al Pacino’s character in the classic film “Dog Day Afternoon.”, Frank Keraudren and Allison Berg’s documentary The Dog tells the life story of John Wojtowicz, who was the model for Al Pacino’s character in Sidney Lumet’s classic film Dog Day Afternoon. As the character in the film did, Wojtowicz attempted to rob a bank in order to get the money for his boyfriend to have a sex-change operation, and while that may be the most colorful story in his life, it’s hardly the only entertaining one as he shares a number of adventures with the filmmakers who spent years compiling footage of their subject.