Terrio is most well known for writing the script for the 2012 Academy Award winning movie "Argo".

Terrio was also hired to rewrite the original script written by David S. Goyer for the Batman v Superman: Dawn of Justice film, directed by Zack Snyder. The film is set for release on March 25th, 2016. He is also set to write the screen-play for a Justice League based film, also directed by Zack Snyder.