<P> Several early episodes have fallen into the public domain . These episodes have been released by several companies in different configurations, with substandard picture and sound quality, edited, and by legal necessity with the copyright - protected Evans - Livingston theme song replaced with generic western music . </P> <P> In 1973, NBC licensed the distribution rights to the series, along with the rest of its pre-1973 library, to National Telefilm Associates, which changed its name to Republic Pictures in 1986 . Republic would become part of the Spelling Entertainment organization in 1994 through Worldvision Enterprises . Select episodes ("The Best of Bonanza") were officially released in North America in 2003 on DVD through then - Republic video licensee Artisan Entertainment (which was later purchased by Lionsgate Home Entertainment). Republic (through CBS Television Distribution, which holds the television side of Republic's holdings) still retains the syndication distribution rights to the series . CBS Home Entertainment (under Paramount Home Media Distribution) is the official home video rights distributor at present . </P> <P> Starting in September 2009, CBS Home Entertainment (distributed by Paramount) has to date released the first eight seasons on DVD in Region 1 . All episodes have been digitally remastered from original 35mm film elements to yield the best picture and sound quality possible with current technology . CBSHE has released each season in two - volume sets (available together and separately). Each and every set contains exclusive multiple and rare bonus features, more than any other vintage long - running television series released on DVD . Classic series collections usually have bonus features included with the first season release only, if at all . </P> <P> In Region 2, AL! VE AG released the first seven seasons on DVD in Germany between 2008--2010 . These releases are now out of print as AL! VE has lost the rights . In 2011, StudioCanal acquired the rights to the series and have begun re-releasing it on DVD, and all seasons have now been released but have not been remastered . </P>

What was the last episode of bonanza called