Only two episodes take place away from Chicago: "The Werewolf" is set on an aging cruise ship, and "The Vampire" takes Carl to Los Angeles. In reality, all shooting took place in Hollywood, except for a handful of pickup shots in Chicago.
Although many sources list Darren McGavin as an Executive Producer, Universal refused to give him any kind of production status on the series. Despite that McGavin unofficially took on many of the duties, with the assistance of his wife, Kathie Browne.
Warning: Kolchak: The Night Stalker guide may contain spoilers