On the Opie and Jim Norton show of 15 April 2015, Louis CK explained that Michael Rapaport accepted the role for "Lenny" three days before filming, and had to learn his lines in three days because the person who was supposed to play Lenny cancelled last-minute (Louis did not want to say who).
Louis C.K. gave Robert Smigel a story credit because he told him the anecdote about a cop losing the gun.
Michael Rapaport's (Lenny) storyline of him being a cop who loses his gun resembles a storyline he had as a guest star on Friends, where he played a cop who lost his badge.