"Universe needs saving," the Doctor said. "I have to go."

"And leave me here, stuck in the TARDIS all alone?" the Master asked.

"Just for a few hours."

The Master gave him a skeptical look.

"Maybe a day or two," the Doctor admitted.

The Master passed him a handful of soft fabric.

"Silk panties?"

"Something to remember me by."

Seven hours later, the Doctor returned, walking carefully. "Do you realize how annoying those are? They roll up and shift and bind at the worst possible moment. And you wanted me to wear them to remember you by?"

The Master smirked.