[nickcarraway]

Do all of them still exist? How do they compare to the radio show?

[LouieFisk]

“Do all of them still exist?”
This kinda explains it -
http://www.nitrateville.com/viewtopic.php?f=7&t=14743

“How do they compare to the radio show?”

Pretty much the same format through all series - radio, 50s and 60s TV versions. Here’s the radio versions:
https://archive.org/details/Dragnet_OTR