Broderick Crawford was Excellent
Kind of a thankless part but watch how still he sits when he and Billie are playing cards, just watching her with a look of unbelief on his face as she titters and tats away to herself while rearranging her cards.
I too felt sorry for his character and his bewilderment when Billie leaves him. I know he is purported to have had somebody killed in the past but hey, I used to feel sorry for Tony Soprano sometimes when he couldn't get a handle on a relationship and reacted with a hurt look on his face. Even brutes can hurt. And if an actor can make me feel that even if his character is generally unlikable, that's good acting. Remember Humphrey Bogart in The Cain Mutiny when he starts in about the strawberries and then stops, realizing he sounds nutty? The captain was an unlikable character but I felt sorry for Bogie.
The character I found most unbelievable was Harry's lawyer.
This positively infantile preoccupation with bosoms!Terry-Thomas about US 1963.Hasnt changed much!