
Two police officers, the older Lt. Stone and the young upstart Inspector Keller, investigate murders and other serious crimes in San Francisco. Stone would become a second father to Keller as he learned the rigors and procedures of detective work.

When a police officer is fatally shot 3 days before he is due to retire, Stone undertakes a relentless search for the killer.

Stone and Keller finally get a lead on a serial killer who has been knifing prostitutes when one of the victims survives the attack.

A salesman attending a convention wrongly believes that he is responsible for the death of an attractive female hitchhiker who had lured him to her houseboat.

A Vietnam veteran goes AWOL from the army in order to kidnap the son he has never seen.

Stone and Keller face off against Gilliam, a wealthy executive who transforms women into his own special image of perfection, then kills them when they inevitably fail to live up to every demented standard of his.

Keller, temporarily partnered with a hotshot detective, sets out to discover why his new partner seems to be absolutely convinced of a murder suspect's guilt for no apparent reason.

Stone appears to be the only one willing to give the benefit of the doubt to a convict who is accused of a murder while out of prison on a 36-hour pass.

When a corner newspaper vendor goes after the muggers who stole his life savings, Stone and Keller discover that the crime is linked to the murder of a housing commissioner.

The murders of a flight attendant and a nurse who were rooming together lead Stone and Keller to suspect a jewelry salesman and his wife.

In their attempt to bring down a family of con artists who victimize entire neighborhoods, Stone and Keller are aided by dissension among the gang members.
Created by: Edward Hume
Available on: ABC