. ▁Doc ▁was ▁played ▁by ▁Bart on ▁Y ar borough ▁and ▁Jim ▁B oles . ▁Reg gie ▁was ▁port rayed ▁by ▁Walter ▁Pat erson ▁and ▁Tony ▁Rand all . ▁The ▁ag ency ' s ▁secretary , ▁Jerry ▁Book er , ▁was ▁played ▁by ▁Gl oria ▁Bl ond ell . ▁After ▁Pat erson ▁committed ▁suic ide ▁in ▁ 1 9 4 2 , ▁his ▁friend ▁Mor se ▁could ▁not ▁bear ▁to ▁rec ast ▁the ▁role ▁and ▁Reg gie ▁was ▁written ▁out ▁of ▁the ▁series . ▁In ▁later ▁shows , ▁Jerry ' s ▁role ▁was ▁increased , ▁and ▁she ▁replaced ▁Reg gie . ▁ ▁Broadcast ▁history ▁Sp ons ored ▁by ▁Fle isch mann ' s ▁Ye ast , ▁I ▁Love ▁a ▁Myst ery ▁first ▁a ired ▁on ▁the ▁N BC ▁West ▁Coast ▁network ▁from ▁January ▁ 1 6 ▁to ▁September ▁ 2 9 , ▁ 1 9 3 9 , ▁week days ▁at ▁ 3 : 1 5 ▁p . m . ▁Pacific ▁time , ▁and ▁then ▁moved ▁to ▁the ▁full ▁N BC ▁network ▁from ▁October ▁ 2 , ▁ 1 9 3 9 , ▁to ▁March ▁ 2 9 , ▁ 1 9 4 0 , ▁air ing ▁week n ights ▁at ▁ 7 : 1 5 ▁p . m . ▁ ▁In ▁ 1 9 4 0 , ▁it ▁expanded ▁to ▁ 3 0 - min ute ▁episodes ▁from ▁April ▁ 4 ▁to ▁June ▁ 2 7 ▁on ▁N BC ▁Th urs days ▁at ▁ 8 : 3 0 ▁p . m .