Although some do exist, very few TV shows are released onto the gnutella network by their owners - all in all they make more money by allowing the broadcast companies to show them once every few years. If you're very sure that the show are are after has been put in the public domain by its owner, select the 'video' option on limewire's 'search' tab and enter its name in the 'title' field. Once done, click on the 'search' button. If no results have appeared within a few minutes, you may want to contact the owners of the TV series and suggest they make it available on gnutella in addition to their current distribution method (ie a web site or ftp server).