Waiter (Victims)
From Tardis Wiki, the free Doctor Who reference
A waiter worked at a cafe on Kol Pasha. He served the Fourth Doctor and Romana II when they visited the cafe. When he went to clear the table after they left, the waiter found a five pound bill on the table. Realising the Doctor hadn't payed him, he tried to look for them, but they were already out of sight. (COMIC: Victims)