"Doctor?" said Grace tentatively. Sure, he'd regenerated again, but that alien fashion sense was unique.
"I beg your pardon, madam?" replied the man in the patchwork coat. "Do I know you?" He turned to the pretty brunette at his side. "Peri, do we know this lady?"
"I don't know her," said Peri. "I've no idea what you know."
"I'm sorry," said Grace, "I—I must have mistaken you for one of my colleagues."
"Then we shall be off," he said.
"Don't be rude, Doctor," said Peri, and smiled at Grace. "He is the Doctor, and I'm Peri. Can we help?"