The end of the story sees Sarah pissed at the Doctor because of the hectic lifestyle she leads as a time traveler and threatens to go home, running off to pack her bags. The Doctor meanwhile receives a call from Gallifrey and has to leave Sarah on Earth as humans aren't allowed there. He tells her this, and it's then we realise that Sarah didn't actually want to leave, and we discover just how much the Doctor really means to her and vice versa. Holy crap, it's powerful stuff. No overdramatic music, no key words connected to their final meeting place, just actors doing what they do best. Tom Baker and Elisabeth Sladen knock it out of the fucking park here, and every one of their lines in this scene is memorable and iconic.