A parole officer is murdered after telling Baretta that a model who supposedy killed herself months earlier is alive in Mexico.
Ed tries to snap Chico out of falling in love with and spending too much on a woman he has fallen in love with.
The strange disappearance of an antique motorcycle is the first indication of trouble. What follows are a rash of murders where each victim is decapitated with superhuman force by what witnesses report is a headless motorcyclist. As Kolchak investigates, he discovers that the victims were all members of a cycle gang back in the 50's. A prank they played on a rival gang member, Harold ""Swordsman"" Baker, resulted in his unintentional decapitation. Baker's ghost killed several of their gang back in the 50's until his head was reunited with the rest of his corpse. However, the cemetary where Baker was interred was dug up and his head and body separated once more. Now, Kolchak must reunite the head and body once more before the headless cyclist finishes off the gang.
Felix starts a picket line with his fellow tenants over high rent rates.
The cases of an easy-going ex-convict turned private investigator.
Wedding plans for the daughter of a friend go awry when the mountain custom of kidnapping the groom get out of hand
Regan is convinced that Eddie Boyse, a recently released career criminal, is responsible for a robbery, but Boyse was with Regan when the crime occurred.
A bomber targets the 12th Precinct, as Det. Fish contemplates retirement.
A policewoman's son has an unusual hobby -- he holds up taxicabs. Eventually this results in the murder of an undercover cop.
Eddie's investigating his ancestry, and is convinced of a royal connection, somewhere. Bill decides to offer a helping hand...
Several people in Walnut Grove get very sick. A quarantine is set up in the church while the source of the illness is being sought.
Richie goes against Howard and, to get a girl, campaigns for Adlai Stevenson in the 1956 Presidential race.
When a young boy is arrested as a witness to a murder, McGarrett must contend with a fiery deputy public prosecutor.
Henry Decory is a schoolteacher who makes a strong statement for compulsory education for frontier children as a stubborn father feels that books and education are a waste of time and tries to keep his son Tommy out of school.
After a severely injured test pilot is rebuilt with nuclear-powered bionic limbs and implants, he serves as an intelligence agent.
Caine tries helping the depressed wife of an Army sergeant, with a drug addiction, and winds up fighting an inner demon of his own creation.
The crew of Los Angeles County Fire Department Station 51, particularly the paramedic team, and Rampart Hospital respond to emergencies in their operating area.