The English rights to Mach GoGoGo were acquired by syndicator Trans-Lux, and Speed Racer premiered on American television in the summer of 1967. In the series, Speed's full name was Go Mifune, in homage to Japanese film star Toshiro Mifune. His name, Americanized, became Speed Racer. His adventures centered on his powerful Mach 5 car, his girlfriend Trixie, his little brother Spritle, Spritle's pet chimpanzee Chim-Chim, and his mysterious older brother, Racer X, whose real name was Rex Racer.