
She's talking to the Professor.
Money Heist Season 3, Episode 8

Tell us the name of the Professor
Money Heist Season 1, Episode 11

Professor Proton said
I should call him Arthur.
The Big Bang Theory Season 6, Episode 22

in this country,
as the Professor would do.
Money Heist Season 3, Episode 6

The PROFESSOR said no news from outside.
Money Heist Season 1, Episode 6