McCloud (1970)

S4E5 This Must Be the Alamo

Amidst a scorching heat wave, Chief Clifford is summoned elsewhere, leaving Sgt. Broadhurst in command. A football gambling operation, benefiting from “insider information on injuries,” misplaces a crucial black book and starts silencing witnesses in their frantic hunt for it. This escalates into an attack on the precinct headquarters, putting everyone on high alert.