 The series ran for 20 episodes across two seasons.It premiered on December 10, 2017, and aired its final episode on February 17, 2019.Howard Silk, a gentle, quiet office worker, has been working for a Berlin-based United Nations agency, the Office of Interchange (OI), for thirty years; however, his rank is too low for him to be told what his work really involves, with him exchanging pre-scripted nonsensical messages.