"The End of the World" is the second episode of the first series of the British science-fiction television programme Doctor Who. Written by show runner Russell T Davies and directed by Euros Lyn, the episode was first broadcast on 2 April 2005.

In the episode, Time Lord the Doctor (Christopher Eccleston) takes his new companion Rose Tyler (Billie Piper) on her first trip through time and space in the TARDIS to the year five billion where many rich alien delegates have gathered on a space station called Platform One to watch the Sun expand and destroy the Earth, but one of these guests is plotting to profit from the event by killing them all.

The episode marked the first appearance of Cassandra and the Face of Boe. The episode was seen by approximately 7.97 million viewers in the United Kingdom.

The Doctor takes Rose to the year 5.5/apple/26, five billion years into her future. They land on Platform One, a space station in orbit around Earth. They have arrived in time for a party celebrating the final destruction of Earth by the expansion of the Sun. The Earth has long since been abandoned, but has been kept up by a historical trust. The Doctor uses his psychic paper to pass as their invitation to the party, and he and Rose find many elite alien beings there. The guests include Lady Cassandra O'Brien, billed as "the last human" but actually a face on a large piece of skin that must be continually moisturised. Also present are the Face of Boe, the Moxx of Balhoon, the Adherents of the Repeated Meme, and sentient and mobile trees from the Forest of Cheem. Rose is overwhelmed by the strange beings and customs as well as how distant she is from home, and leaves to an observation room to collect her thoughts. The Doctor follows her, and tries to cheer her up by allowing her to call her mum Jackie by altering her mobile phone to be able to work over the distance in time.

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