Mrs. Koehler is a fictional character portrayed by Geraldine Singer in the TV series The Blacklist.
In the first episode they appeared in, titled Dr. Hans Koehler (No. 33) (season 6), they were 70 years old.
They appear in 1 episodes out of a total of 218 aired
Episodes1
Dr. Hans Koehler (No. 33)
episode S6.E1 january 2019Red gives the Task Force a Blacklister case, who creates new identities for criminals. Liz and her sister secretly investigate the events that took place the night the real Raymond Reddington died.