Surviving recordings of this series are highly prized by DuMont Television Network fans.
Ellery Queen addressed the audience directly towards the end of each episode to ask if they had deciphered the mystery.
The final DuMont broadcast was on 6 December 1951, and the series then moved to ABC.
Lee Bowman was called in to play Ellery Queen after Richard Hart suffered a heart attack and died before he could complete the season.
Most of the DuMont Network-era episodes no longer exist in any format.