<P> As of 2016 , there are twenty - seven Treehouse of Horror episodes , with one airing every year . They are known for being more violent than an average Simpsons episode and contain several different trademarks , including the alien characters Kang and Kodos who have appeared in every episode . Quite often the segments will parody well - known movies , books , radio shows , and television shows . The Twilight Zone has been parodied quite often , and has served as the inspiration for numerous segments . </P>
<P> As of 2016 , there are twenty - seven Treehouse of Horror episodes , with one airing every year . They are known for being more violent than an average Simpsons episode and contain several different trademarks , including the alien characters Kang and Kodos who have appeared in every episode . Quite often the segments will parody well - known movies , books , radio shows , and television shows . The Twilight Zone has been parodied quite often , and has served as the inspiration for numerous segments . </P>
how many simpsons treehouse of horrors episodes are there
how many simpsons treehouse of horrors episodes are there
twenty - seven
twenty - seven