 Steven Bochco (qv) originally wrote this script in 1973 for the  third season but it was not made because Peter Falk (I) (qv) felt  the villain was not interesting enough. A few years later, Bochco  used the story for a 1977 episode of  _"McMillan & Wife" (1971)_ (qv). Falk apparently changed his mind by  the time this episode was filmed.