After looking to see if any other DS related cast members ever appeared on the show, I see where:
Rebecca Staab appeared in The Pretty Baby Mystery, part of the Binge today at 6pm ET,
Stefan Gierasch appeared in The Confidence Mystery, part of the Binge on Sunday at 4am ET, and
Robert Viharo appeared in The Solid Gold Headache Mystery, part of the Binge on Sunday at 5am ET.