The Tyger

"The Tyger" was a poem.

After Tommy looked into the Metebelis crystal and realised he could now read much better, he went to get more books from the meditation centre's library. There he found a book of poetry which included The Tyger, and proceeded to read the opening verse aloud:

Tyger Tyger, burning bright,

In the forests of the night;

What immortal hand or eye,

Could frame thy fearful symmetry?

Tommy called the poem "pretty" before deciding "beautiful" was more suitable. (TV: Planet of the Spiders)

Mike Yates' father read the poem to him when he was a boy. (AUDIO: Time Tunnel)

Behind the scenes

Its real world author, William Blake, is not named on-screen, but he is featured in other stories set in the Doctor Who universe.