S37·E73 Episode 4959 (Thu 10th Apr 2008)

Carl and Matthew clash at the Chamber of Commerce luncheon and it's not long before fists start to fly. Carl storms out, but Matthew follows him and things escalate. Carl flippantly comments that it's a good job he killed their father and Matthew sees red and attacks him. Donald finds an unconscious and badly beaten Carl. When Carl wakes up in hospital Donald urges him to call the police, but he refuses.