Roger Thursby is just starting out as a barrister, full of ideals, but he is a bit too keen for his fellow lawyers.
To aid the air of dishevelment surrounding Alfred Green, Terry-Thomas slept in his costume for a fortnight (two weeks) before filming, and rubbed at the suit-seams with a pumice stone.
As far as old Charles is concerned, sex has been supplanted by the internal combustion engine. I've never knew a fellow who could get so worked up over a couple of big ends.
Closing credits epilogue: IF ALL THE CHARACTERS IN THIS FILM WERE NOT FICTITIOUS - IT WOULD BE ALARMING.