“Are you drunk?” Donna asked the Doctor, hands on hips and a stern expression on her face.
“I do believe I am!” He grinned back at her, that slightly manic grin she was already so used to. “Rather fun, isn’t it?”
“You won’t be sayin’ that in the morning, Sunshine!” she assured him, steering him in the direction of the TARDIS. “I should confiscate your keys, You’re in no condition to drive; we’d be goin’ around in circles.”
Although he could’ve shrugged off the effects any time he wanted, the Doctor decided he’d stay drunk just a little while longer.