William Shatner hosted a reality-based television series.
Star Trek . It followed the interstellar adventures of Captain James T. Kirk ( William Shatner ) and his crew aboard the starship USS Enterprise , a space exploration vessel , built by the interstellar federal republic United Federation of Planets in the twenty-third century . The Practice is an American legal drama created by David E. Kelley centering on the partners and associates at a Boston law firm . William Shatner . Shatner also played the eponymous veteran police sergeant in T. J. Hooker ( 1982 -- 86 ) and hosted the reality-based television series , Rescue 911 ( 1989 -- 96 ) , which won a People 's Choice Award for the Favorite New TV Dramatic Series . From 2004 until 2008 , he starred as attorney Denny Crane in the final season of the legal drama The Practice and its spinoff series Boston Legal '' , a role that earned him two Emmy Awards .