Darren McGavin and Gerald S. O'Loughlin both appear in this episode. McGavin would later appear in the pilot for The Rookies (1972) TV series playing Lt. Eddie Ryker. When the show was picked up by ABC, he was replaced by O'Loughlin.
When Grant Shay is talking to the hostages,he is leaning on a corral gate that clearly has a hexagon bolt through it.This didn't exist back then.
Betting that the 'boy' who played Johnny...the child that made an escape attempt...was girl actress, Kim Darby.