#8 is Adrian Carsini, commenting on the dessert wine Columbo gives him at the arrest.
#6....oh dear. Columbo counts down like that when he is testing Abigail Mitchell's safe to see if it is soundproof, but I don't remember a "bingo" at the end, so that is probably wrong.
#10. I knew you'd choose...Again, I'm not sure. When Santini is playing the game with the waiter while pretending to be in his office, I think the paper reads, "I knew you'd pick #4."