Juan was a Spanish lorry driver working in the vicinity of the Dona Arana's hacienda. The Second Doctor, who had been partially transformed into an Androgum, hailed down Juan's vehicle. As Juan leaned out of the cab to ask what he wanted, Shockeye struck him across the back with a log, killing him. (TV: The Two Doctors)
Behind the scenes
Juan's name is given in The Universal Databank. The character was played by an unknown Spanish stuntman.