Show off your love for classic humor and sci-fi with this black t-shirt. The shirt features the classic "Knock Knock" joke setup, with "Who's there?" in gold. The punchline, "DOCTOR. doctor who?" is prominently displayed, making it a conversation starter. The letters "VFS" are featured below the joke. Made from what appears to be soft, breathable cotton, this tee is perfect for casual wear, fan conventions, or simply lounging around. It would make a great gift for any fan of the show or for someone who appreciates a good pun.