After Al tells Richie the corrupt dispatcher has a dishwasher, Richie replies "A lot of people have dishwashers". This may have been true in 1977 when this episode was filmed but in late 50s, when it was likely set, dishwashers were still too expensive to be widely adopted. Case in point, the Cunninghams do not have a dishwasher.
Al is clearly visible in the alley behind the blinds, despite only meaning to show his shadow.