▁At ▁one ▁time , ▁Do yle ▁was ▁a ▁professional ▁box er . ▁ ▁Radio ▁Do yle ▁played ▁Len ▁Harr ington , ▁the ▁investig ator ▁for ▁the ▁title ▁character , ▁in ▁Mr . ▁District ▁Att orney . ▁He ▁was ▁in ▁that ▁role ▁for ▁ 1 3 ▁years — all ▁but ▁the ▁first ▁few ▁months ▁of ▁the ▁program ' s ▁existence . ▁ ▁Although ▁he ▁appeared ▁in ▁many ▁plays ▁and ▁had ▁offers ▁of ▁more ▁st arring ▁roles ▁on ▁stage , ▁Do yle ▁said ▁he ▁preferred ▁radio ▁" because ▁it ' s ▁more ▁fun ▁than ▁the ▁the ater ▁and ▁more ▁people ▁hear ▁you ." ▁ ▁Television ▁Do yle ▁carried ▁his ▁role ▁of ▁investig ator ▁Harr ington ▁from ▁radio ▁to ▁the ▁television ▁version ▁of ▁Mr . ▁District ▁Att orney . ▁The ▁program ▁ran ▁October ▁ 1 , ▁ 1 9 5 1 ▁- ▁June ▁ 2 3 , ▁ 1 9 5 2 , ▁on ▁N BC . ▁ ▁Stage ▁Do yle ▁deb uted ▁on ▁stage ▁in ▁The ▁Au ction e er ▁when ▁he ▁was ▁ 1 7 , ▁and ▁he ▁acted ▁with ▁Pennsylvania ' s ▁Lanc aster ▁Stock ▁Company . ▁His ▁early ▁the atr ical ▁experiences ▁included ▁being ▁" ship w reck ed ▁in ▁the ▁waters ▁south ▁of ▁Australia " ▁after ▁a ▁ship ▁carrying ▁an ▁acting ▁tr oupe ▁was ▁hit ▁by ▁a ▁ty ph oon . ▁The ▁group ▁was ▁res cu ed ▁by ▁an ▁Ant ar ctic ▁expedition ▁head ed ▁by ▁Admir al ▁Richard ▁E . ▁By rd . ▁ ▁In ▁the ▁ 1 9 3