"Blink" is the tenth episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on 9 June 2007 on the British Broadcasting Corporation (BBC). The episode was directed by Hettie MacDonald and is the only episode in the 2007 series written by Steven Moffat. The episode is based on a previous short story written by Moffat for the 2006 Doctor Who Annual, entitled "'What I Did on My Christmas Holidays' By Sally Sparrow".

In the episode, the Doctor—a time travelling alien played by David Tennant—and his companion Martha Jones (Freema Agyeman) are trapped in the past and try to communicate with a young woman, Sally Sparrow (Carey Mulligan), to prevent the statue-like Weeping Angels from taking control of the TARDIS. Sparrow and her best friend's brother, Larry Nightingale (Finlay Robertson), must unravel a set of cryptic clues sent through time by the marooned Doctor, left in the abandoned estate Wester Drumlins which the Angels currently occupy.

The Doctor and his companion have very little screen time, which allowed for another episode to be filmed simultaneously; "Blink" is consequently referred to as a "Doctor-lite" episode. The scenes at Wester Drumlins were shot in a derelict house in Newport. To create the angels, two actresses wore makeup and prosthetics. The episode was seen by 6.62 million viewers in the United Kingdom.

"Blink" received widespread critical acclaim, and is widely considered to be one of the best episodes of the show. Moffat won the BAFTA Craft and BAFTA Cymru awards for Best Writer, and the Hugo Award for Best Dramatic Presentation, Short Form, while for her single performance in the series, Mulligan won the Constellation Award for Best Female Performance in a 2007 Science Fiction Television Episode. In 2009 the episode was voted the second best Doctor Who story ever by readers of Doctor Who Magazine.

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