If you meant the first episode of one of the related TV series, here are the details:
: Vash is captured by the Dodongo brothers , who seek revenge for a 270-year sentence they received because of him. Trigun: Badlands Rumble Episode 1
: Episode 1 is titled "The $$60,000,000,000 Man" . It introduces Vash the Stampede as he is pursued by bounty hunters and insurance agents Meryl and Milly in a desert town. If you meant the first episode of one
: Chronologically, the Badlands Rumble movie is considered canon and is best watched between Episodes 10 and 12 of the original 1998 anime series. Blu-ray review — Trigun: Badlands Rumble - George Ivanoff Trigun: Badlands Rumble Episode 1