A Russian agent discussed with an unknown individual(s) about Russian spies on American soil. Unbeknownst to him, the American lab test subject Eleven was listening in, harnessing her psychic abilities as commanded by Hawkins National Laboratory.
The translated dialogue of the Russian:
"There are rumors that Americans have exposed few of our spies on American soil. We are checking it. Perhaps it was intentional disinformation in order to shift our focus from more important things. Contact Evgeniy, Sergey and Anatoliy, find out who made a contact (with them) and if someone didn't, report to me immediately... Actually no, bring Sergey to me right away. He was on duty when this information... Rumors, appeared first. I need to know where rumors came from... If this is not disinformation, but I am fairly certain, I don't want to think about the consequences. Go now, what are you waiting for? Hurry up, I need to know where rumors came from."
Behind the scenes
The characters is credited as "Russian Man".