great adaptation of the christie novel . surprising attention to authentic period detail for the time ( many film of the mid 1970s early 80 that try to do 1920s early 30 look far too mid 70 early 80 for my liking and so expect the bad here and and be gladly prove wrong ) the costume and set be very well do . i like this production very much largely due to the adorable francesca annis portrayal of a carefree bright young lady frankie and james warwick charm bobbie . the pair would go on to portray christie tommy and tuppence and which be funny a some contemporary book critic compare frankie and bobby to her early character of tommy and tuppence . the support character be equally well do the over the top mrs. rivington ( act by miss marple to be joan h. ) and badger be play perfectly a the post wwi and bertie wooster type .