--Access Denied--
"Come on, Doctor," Melanie said exasperatedly.
"You can't rush a genius," he retorted.
"But I know your passwords."
--Access Denied--
"Ha," the Doctor bellowed in triumph. "It's not always 'kitty'!"
"Maybe it's in my other coat," he mumbled after checking all the colourful pockets. He even examined his kitty pins.
"Ha!"
--Access Denied--
"Great, third miss. Now you'll never get in!"
"Don't shout, Mel! It's the refuge of the dim-witted!" he replied even more loudly.
--Access Granted--
"Hm, miss thrice and enter."
"What kind of security system is that?" Melanie asked incredulously.
"The brilliant kind. I designed it."