Perry is wearing an arm sling in this entry. In early 1965, Raymond Burr was recovering from a shoulder injury he got while flying in a helicopter in Vietnam.
The judge has no lines in this episode. There are no objections raised by either Perry or Burger at the hearing, and there's none of the squabbling between them found in so many episodes.
Guest star Jean Hale is not related to longtime Perry Mason regular Barbara Hale.
According to the Federal Aviation Administration's (FAA) aircraft registry, tail number N8374Z is a Cessna model 210-5(205), manufactured in 1963. The most recent registration certificate was issued October 23, 2008. The aircraft was deregistered on May 21, 2010, because it was exported to Mexico.