The arrival of Mac's mother (Shelley Winters) only compounds the troubles for the two detectives who must contend with prostitute Cookie Fondue (Donna Dixon), the sole witness to a murder.

A former partner (Tige Andrews) from Chicago arrives and immediately begins running Mac and Andy's lives during their investigation into an unidentified man's murder.

The former Chicago police officers receive a crash course in ancient Hawaiian customs during an island investigation in which "an ancient icon" predicts their doom. 

Mac and Andy work with New York policewomen (Lorna Patterson, Brianne Leary) who pose as their wives for an investigation of a honeymoon resort.

While investigating sales of stolen Army weapons, Mac and Andy turn up the dog tags of Andy's brother, who was reportedly killed in Vietnam.

Riley and Senkowski pursue a doubly difficult case when a known deranged killer is set free by the Court, then murdered by a vigilante in a series of attacks on other freed criminals.

Heat At Major Oshira's request, Mac and Andy go undercover as two big-time gamblers to find a murderer.

A possible murder aboard the winning yacht during the Transpac Race leads Mac and Andy into the big case they have been waiting for to prove themselves as detectives.

Officers Riley and Senkowski investigate a bizarre case, which involves an exploding volleyball, a murdered athlete, a parcel of attractive women and a luxury resort

Disillusioned Chicago policeman Mac Riley (Robert Ginty) shanghais his partner, Andy Stenkowski (Jeff McCracken), to Hawaii, where they help Honolulu authorities crack a drug-smuggling operation.