Buuxi weedhan soo socota: 1937, Moorehead wuxuu ku biiray Orson Welles' Mercury Players, isagoo ka mid ah jilayaasha ugu waaweyn ee uu la socdo Joseph Cotten. (Markii ay ka soo muuqatay "The Dick Cavett Show" bishii Febraayo 19, 1973, waxay shaaca ka qaaday in, 1922, ay si lama filaan ah ula kulantay Welles (oo 15 sano ka yar) markii uu ahaa toddobo sano oo kaliya Waldorf-Astoria Hotel ee Magaalada New York.) Waxay ku soo bandhigtay barnaamijyada raadiyaha ee "The Mercury Theatre on the Air", waxayna door joogto ah ka qaadatay Welles taxanaha "The Shadow" oo ah Margo Lane. Sanadkii 1939, Welles wuxuu u wareejiyay Tiyaatarka Mercury ee Hollywood, halkaas oo uu ka bilaabay inuu u shaqeeyo RKO Pictures. Dhowr ka mid ah fanaaniintiisa raadiyaha ayaa ku biiray, Moorehead waxay sameysay filimkeedii ugu horreeyay iyada oo ah hooyada jilaaga, Charles Foster Kane, ee "Citizen Kane" (1941), oo ay u tixgeliyaan inta badan naqdiyaasha filimka inay yihiin filimada ugu fiican ee abid la sameeyo. Moorehead wuxuu ka soo muuqday filimkii labaad ee Welles, "The Magnificent Ambersons" (1942), wuxuuna helay Abaalmarinta Dhaleeceynta Filimka ee New York iyo
Waxay ku guulaysatay abaalmarinta Oscar-ka qaab ciyaareedkeeda. Waxay sidoo kale ka soo muuqatay "Journey Into Fear" (1943), oo ah filim laga sameeyay Mercury.