...he starred in

https://www.metv.com/stories/harry-morgan-admitted-that-the-original-dragnet-was-better-than-the-reboot-version-he-starred-in

"A lot of the esteem has gone out of television," Morgan said.

Harry Morgan would read police pamphlets to help prepare him for Dragnet (https://www.metv.com/stories/harry-morgan-would-read-police-pamphlets-to-help-prepare-him-for-dragnet)

Morgan never stopped educating himself.