‘A Man in Uniform’

David Wellington’s 1993 production has a terrific idea: Henry Adler (Tom McCamus, pictured), a mousy bank clerk and sometime actor, gets a role as a brutal cop in a TV series and allows it to take over his personal life. The problem is that Henry is a blank, and his fixations and emotional contradictions are too clinical to engage us. Yet the film is watchable because of the way it portrays the creepy, powerful feeling a weak man can acquire by wearing a police uniform (HBO early Tuesday at 5:15 a.m.).