this one be a long time favorite of mine . don knotts and tim conway be utterly hilarious in this comedy whodunit . knotts and conway be two investigator call in from scotland yard to investigate the death of lord and lady morely and two wealthy british aristocrat . the support cast ( who one by one mysteriously get knock off and disappear from the house ) which consist of the hired help at the morely home be equally hysterical and formidable catalyst to knotts and conway humor . the next time youre at the video store look for some light and funny fare and check this one out . it well worth the rental .