Thank you very much! I was looking for this.

This seems to be part of the soundtrack too, perhaps what you're looking for?

https://www.youtube.com/watch?v=FJFClgGFAmM

I cant clearly remember the episode but profesor was talking with inspector at phone
 He said that i listening Greek sirtaki in the mornings and feel more energetic


I think I remember hearing Zorbas in the series, but not sure if that's the one you mean. What episode/time are you talking about?

https://www.youtube.com/watch?v=QskFT7AaKH0

of course, Season 1 at the end of episode 9

Do you know the name of the sirtaki which professor listening in the serial

Sirtaki