This "part" starts at 3x01.

And the song for this part is Say you love me by Jessie Ware

"Just say you love me, just for today
And don't give me time 'cause that's not the same
Want to feel burning flames when you say my name
Want to feel passion flow into my bones
Like blood through my veins

'Cause I don't wanna fall in love
If you don't wanna try
But all that I've been thinking of
Is maybe that you might
And babe, it looks as though we're running out of words to say
And love's floating away"

Enjoy!