Perry and Della are onboard the Westminster sailing from British Columbia. Raymond Burr was born and is buried in New Westminster, BC.
In court, shortly after Perry Mason (Raymond Burr) begins his questioning of Laura Houser (Maureen Cassidy) on the witness stand, a very large housefly is plainly seen landing on the top side edge of the judge's bench behind the witness, then takes off and flies a short, loopy flight then lands on the bench once again, this time on a lower ledge, crawling along the ledge for several seconds.