Triangle: Part 1

Terence Finlay was stabbed to death at the house where he lodged with Beryl Jackson and Gerald Prosser. Only one - or both - of these people could have committed the crime. The prosecution argue they jointly killed the victim whom they had manipulated and financially exploited for some time. However each defendant protests their innocence and claims the other was solely responsible. Both defendants admit to criminal pasts and have to explain how large sums of money entered their bank accounts around the time similar amounts were withdrawn by Finlay.