When Dragnet premiered in 1949, it used subject matter that previous crime dramas wouldn't have touched with a ten-foot pole, like rape and child murder.
Many Adventures in Odyssey listeners remember the episode "The Mortal Coil". Whit tries to program a special "Heaven" program into the Imagination Station. Long story short, Whit almost dies, Eugene has a Heroic B.S.O.D. from experiencing Hell when he tried the programnote Eugene wasn't a Christian at the time, and other things which made that episode famous among listeners as the most terrifying episode in the show's history.