Gretchen is a fictional character portrayed by Ann Arvia in the TV series The Blacklist.
They appear in 1 episodes out of a total of 218 aired
Episodes1
Lady Ambrosia (No. 77)
episode S3.E14 february 2016A child who had been missing and presumed dead reappears, prompting Red and Liz to hunt down a woman who is known to abduct children; Tom puts himself in a consequential position after aiding Gina.