the dummy used in this episode to portray "willie" was originally created in the 1940s by puppetmaker revello petee. the same dummy was used later, in the 1964 "twilight zone" episode, "caesar and me". the actual original dummy which was used in both episodes had been housed in a private collection in connecticut since the late 1970s, but now resides in david copperfield's international museum and library of the conjuring arts in las vegas, along with the cliff robertson dummy effigy which appears at the end of this episode. both puppets were subject to a careful, preservative renovation by american artist and puppet restoration expert alan semok.