Shot in seven days.
Of the 3 PRC Vance features,this was the second to be released (June 14, 1947) but the last to be shot (December 17, 1946-early January 1947). This was also the very last Philo Vance feature film, of a total of 14 dating back to 1929.
Phyllis Planchard's debut.
This film's earliest documented telecasts took place in Los Angeles Monday 26 February 1947 n KECA (Channel 7) and in San Francisco Saturday10 March 1951 on KGO (Channel 7).