I don't own any characters you recognize.

The Doctor grinned as he threw the rubber ball across the console room.

K-9, his faithful robot dog, trundled across the room and rolled the ball back towards the Doctor.

'Master.'

'No, K-9. No more throws.'

'Master.' K-9's ears swiveled and his tail wagged. He nudged the Doctor's leg.

'All right, all right. But this is the last time.'