Just watched pilot episode of Barnaby Jones. In there there's Frank Cannon, the same character from Cannon TV series.
Both shows were released in the 1970s, and both are on CBS, and both have the same creator. Also, both Cannon and Barnaby are private detectives, so both shows are of similar nature.
With all this in mind, would it be alright to add them as part of the same franchise, or is this too little of a connection?