Father's Day

Plot
Cecil gets it into his head that he could be Gloria's father and asks May to leave Jack for him. May admits to Ethel that she and Cecil had sex and he could be right. Jack knows none of this but still resents Cecil and sets out to kill him. Cecil discovers that Gloria cannot be his daughter as they are of different blood groups. Jack decides against killing Cecil, just putting a bucket of sump oil on top of the door to fall on him instead.