As per your request I am providing you the details about the nerdist podcast and the lists of shows taken place in 2015.

The Nerdist Podcast is a weekly interview show hosted by Chris Hardwick who is usually accompanied by Jonah Ray and Matt Mira.

The audio podcasts are typically an hour in length and include conversations with notable comedians or entertainers, sometimes at their own home.

The lists of episodes took place in 2015 are;

Kate Walsh
January 2, 2015
Wayne Knight
Andrea Romano
"Hostful" #86 Vacation Brain
Gillian Anderson
Simon Amstell
Ethan Hawke
Rainn Wilson
Bill Gates
Jason Lee and Sam Trammell
Nick Kroll returns! #4
Nathan Willett and Matt Maust of Cold War Kids
"Hostful" #87 It's the 5th anniversary of The Nerdist Podcast!
Paul Williams and Tracey Jackson it's a Paul Williams 3-peat!
Pauly Shore
David Cross
Jeff Bridges 3-pete!
Jemaine Clement and Taika Waititi
Ari Shaffir
Scott Aukerman returns!
Simon Helberg
Sleater-Kinney
Brian Cox and Eric Idle
"Hostful" #88 Nerdist Live at SF Sketchfest! Recorded 2/6/15 at Marines Memorial Theatre!
Glenn Howerton and Rob McElhenney
Ted Melfi
"Hostful" #89 Short Pants
Michael McKean
Jack Antonoff
Kurt Braunohler returns!
Josh McDermitt
Brian Michael Bendis
The Workaholics, Adam Devine, Anders Holm, Blake Anderson and Kyle Newacheck
"Hostful" #90 Button Pushers
John Lynch
The Amazing Randi! James Randi
Kal Penn
Ben Gibbard