Shelley Duvall guest stars as Aggie, an incredibly naïve young waitress. Aggie is the only witness when a cop accidentally kills his girlfriend. Preying upon Aggie's childlike faith in the infallibility of authority figures, the killer persuades her to finger another man as the culprit -- but undercover detective Tony Baretta (Robert Blake) smells a rat. This was the final episode of Baretta's second season. ~ Hal Erickson, Rovi