Unnamed Reverse Engineering Podcast - it focuses mainly on reverse engineering hardware and firmware. I haven't done any non-trivial reverse engineering projects and even the ones I have done are software but I still find it super interesting.

Darknet Diaries - Podcast revolving around hackers/hacks/etc

Malicious Life - Podcast centered around historical hacks or malware.

Advent of Computing - about the history of computer and computer related technology

ClojureScript Podcast - about clojurescript

Indie Hackers - interviews with indie startup founders

Revolutions - detailed history of various revolutions throughout history. Currently on the revolutions of Russia.

TechStuff - episodes on various tech related topics