Sweets

It had taken much planning, but her fiendish plot had succeeded. She snuck away from the scene of the crime carrying her paper bag prize.

Later:

The Doctor and Romana are stopped outside the throne room of Dictator Grumm by a gruff guard.

The Doctor approaches with a winning smile and produces a paper bag from his pocket.

The guard looks suspicious.

The Doctor grins more widely.

"Hello," he says reaching into the bag. "Would you like a..." He pulls out a sweet. "...um..." the Doctor falters. "Sherbet lemon?" he asks, recovering.

The guard scowls.

The Doctor pales.

"Oh dear."