Diplomatic Relations: Take Three
The Doctor and Brittany were strolling down a perfectly ordinary street in the middle of London, when the Time Lord's phone rang. It was UNIT.
"Hello?" he said, lifting the phone to his ear.
"Doctor, it's the Sontarans," came the response.
The Time Lord choked. "Those short baked-potato-heads again?" he spluttered.
"I can see who would win awards for diplomatic relations," Brittany laughed, making a point of jabbing the Doctor in the ribs.