BRIGHT YOUNG THINGS ( 2003 ) Friday at 10 p.m. on Sundance Stephen Fry 's giddy , good-looking period film , based on Evelyn Waugh 's '' Vile Bodies , '' is about London 's beautiful , party-happy 20-somethings in the 1930 's , determined to prove that life is n't at all serious when , of course , it is .