The acting was terrific by the supporting characters too

1. Sollozzo's evil look, telling Tom let me worry about murdered Luca
2. Tessio when he realized he was a dead man
3. Carlo's fear he had to answer for Santino and then relief thinking he was getting a pass
4. Michael's bodyguard without saying a word too
5. Cicci being comical and Chairman was not amused
6. Questadt when the Chairman agreed for Michael to read his statement
7. Pentangeli on seeing his brother and Vincenzo's steely, icy stare