Penny-farthing

From Tardis Wiki, the free Doctor Who reference
A penny-farthing on the Morok mind-reader's screen. (TV: The Space Museum)

Penny-farthings were an early form of bicycle. While strapped into the Morok mind-reader, the First Doctor was questioned by Lobos on how he came to Xeros. He thought of a penny-farthing and an image of one appeared on the device's screen. (TV: The Space Museum)

Penny-farthing