Falls the Shadow is an original novel written by Daniel O'Mahony and based on the long-running British science fiction television series Doctor Who.

[1] It features the Seventh Doctor, Ace and Bernice.

A prelude to the novel, also penned by O'Mahony, appeared in Doctor Who Magazine #218.

The title is taken from T. S. Eliot's poem The Hollow Men, a title also used, incidentally, for a Doctor Who novel.

The relevant lines of the poem are quoted in the 2007 TV episode The Lazarus Experiment.