What is tk421?

"TK-421" is a character in the Star Wars universe, specifically appearing in Episode IV: A New Hope. He is an Imperial Stormtrooper stationed on the Death Star who is famously knocked out and impersonated by Luke Skywalker and Han Solo in order to infiltrate the space station and rescue Princess Leia. TK-421 is portrayed by actor Stephen Bayley in the film. The character has become somewhat of a cult figure within the Star Wars fandom due to his iconic lines and memorable scene.