The Doctor, Steven and Dodo have just arrived on Bukol on a passenger liner and are passing through customs. However, when the Doctor shows his visa, the image is of a different man. To the Doctor's shock, his companions denounce him as an imposter. The Doctor is taken away and interrogated by Yerma, who doesn't believe his story. He thinks the Doctor might be a criminal named Mykloz, who is a master of disguise. They head for the hospital to find the other "Doctor", but his hospital room is empty.