The only scene I remember is a guy with slicked-back longer blond hair, probably a no-good character is having a conversation with a sinister crime-boss/loneshark/drug dealer, possibly about money owed…

The evil crime boss guy was clean cut, brown hair with a beard/mustache and was fondling a ming vase, before he pulled out a switch blade and quickly stabbed the blond guy.

The blond guy then retreats, and is shown trying to act normal, he goes to a bathroom to comb his hair and get cleaned up while plugging the stab wound with his finger.

He then walks down the street and gets in a taxi, and keels over in the back of the cab.

I was a kid, and I never saw the title or much more than this sequence on tv.