Washburn is an Enterprise crewman who beams aboard the crippled USS Constellation with the damage control party in The Doomsday Machine and helps Scott coax the wrecked starship back to life.
Washburn is a member of the Enterprise crew who appears in the second-season Original Series episode The Doomsday Machine. When the Enterprise finds the USS Constellation drifting and badly mauled, he is part of the damage control party that beams across with Kirk, McCoy and Scott.
Aboard the wreck he surveys the ship's systems and reports to Kirk on how little is left working, with the warp drive ruined and the phaser banks drained. He then stays behind with Scott and the rest of the party while the Enterprise, under Commodore Decker, goes into battle with the planet killer.
Washburn works under Scott to restore impulse power and a single phaser bank, repairs that let Kirk draw the machine away from the Enterprise. He is beamed home with the others before the Constellation is flown into the machine's maw.