Patton Oswalt

Patton Oswalt portrayed Agent Eric Koenig in the Agents of S.H.I.E.L.D. episodes Providence and The Only Light in the Darkness, Agent Billy Koenig in Beginning of the End in Season One and in Shadows and Ye Who Enter Here and What They Become in Season Two and Agent Sam Koenig in Ye Who Enter Here and What They Become in Season Two.

He also appeared as Agent Sam Koenig (along with himself as Billy Koenig) in a promo video for the Marvel TV panel at the 2014 San Diego Comic-Con.

He was also interviewed for the documentary Marvel 75 Years: From Pulp to Pop.

Trivia

 * Patton Oswalt is one of the few actors in the Marvel Cinematic Universe who have portrayed two different characters. He is also the only actor to potray multiple characters who aren't background characters.
 * Patton Oswalt also portrayed Hedges in the production .
 * Patton Oswalt previously worked with Joss Whedon on .