As far as atheist activists, I follow Matt Dillahunty, mostly, with a mix of others like Hemant Mehta and Seth Andrews. I met Matt Dillahunty in Columbus once.

I am a podcast fanatic. On this topic, one of my favorite podcast was reasonable doubts. They don't podcast anymore, they haven't for a few years. But I went ahead and went through the catalog again anyway. Very very good.

99% Invisible

The Atheist Experience was always a favorite, along with others that people have mentioned here.

Some that I don't see mentioned are Cognitive Dissonance and Irreligiosophy. They're both on the comedy side for the most part. Irreligiosophy doesn't record much anymore, but the early episodes were hilarious and informative. Many discussions and explanations about things that would otherwise take a lot of research to find out about.

An excellent podcast is “S-Town”. It’s not just about religion but.....you’ll see.

I am very old and technologically illiterate... What is a "podcast", please?

I like Seth Andrews at The Thinking Atheist, but I guess I'm a bit of an asshole since I much prefer the Scathing Atheist and The Skepticrats. Lol.

On a side note, anyone else here a member of the Godless group on facebook?

Well, yeah...watch matt and crew most weeks...love the show...(my only worry, at times, tracy interrupts and hogs the conversations too much...?)...but neil degrasse tyson, (sp)...lawrence krause, sam harris, etc, etc...and i know, they don't have official 'podcasts' but still admire their views and thoughts...

It's not an Atheist podcast, but one of my favorites is the Joe Rogan Experience. He's had many great guests, from MMA fighters, to CMD. Chris Hadfield (astronaut), to Dr. Neil DeGrasse Tyson.

I have two primary podcasts that I listen to. Thank God I'm Atheist is my favorite [thankgodimatheist.com] I sometimes listen to Seth Andrews, but that depends on the topic - he is a great broadcaster but his show topics don't always hold my interest.

Ask An Atheist is my second "go to" [atheist.radio] it is a show local to me, and some of the guest hosts are with my local atheist/skeptic group, so I usually listen to them too.

Those posted above. Plus Aron Ra, Must mention Richard Dawkins Christopher Hitchins, Many more.