Baretta: Dear Tony (1976)

Synopsis
Most of this episode is related in flashbacks, as undercover cop Tony Baretta (Robert Blake) reads a suicide note left behind by a close friend. The bulk of the story concerns policewoman Pat Harley (Anjanette Comer), who had teamed up with Baretta to investigate the death of her husband, likewise a police officer. The investigation dredges up frustrating memories of Pat's private turmoils, culminating in a shattering climax. ~ Hal Erickson, All Movie Guide