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Catch me who can was the third steam locomotive created by Richard Trevithick, (after those at Penydarren ironworks and Wylam colliery). Built in 1808, it was demonstrated to the public at a "steam circus" organized by Trevithick on a circular track in Bloomsbury, just south of the present-day Euston Square tube station in London.

The locomotive reached a top speed of 12 mph (19 km/h). It proved too heavy, however, for the relatively brittle cast-iron rails then in use and Trevithick closed his exhibition after a broken rail caused a derailment.