Speed Racer - Season 1 - Eps 50: The Trick Race
This is a sequel to the 'The Most Dangerous Race' and takes place one year after the events related in that episode. It involves a group of international spies tricking the Car Acrobatic Team and Speed Racer into having a race. The race is to lure out Racer X who the spies have figured out is Speed's older brother. In addition the spies have planted bombs in the cars of the Car Acrobatic Team to blow up Speed. In the end it is the spies who get blown up. Also Speed figures out that Racer X is his brother Rex and asks him. Racer X knocks out Speed, removes his mask, and vows to stop being a racer and become a full time secret agent.
About Speed Racer

Title: Speed Racer
First Air Date: 1967-09-23
Last Air Date: 1968-03-15
Status: Ended
Rating: 7.4/10 (from 117 votes)
Language: JA
Seasons: 2
Total Episodes: 52
Network: Fuji TV
Genres: Animation, Family, Action & Adventure, Sci-Fi & Fantasy, Kids, Comedy
Production Companies: Tatsunoko Production
Synopsis
Teenager Speed Racer aspires to be the world's best race-car champion with the help of his friends, family and his father's high-tech race-car, the Mach 5.
Cast

Katsuji Mori
Speed Racer

Teiji Ōmiya
Pops Racer

Ryoko Kinomiya
Mom Racer

Kei Tomiyama
Sparky

Kenji Utsumi
Inspector Rokugô

Hiroshi Ôtake
Chim-Chim

Kin'ya Aikawa
Racer X

Michiko Nomura
Trixie

Junko Hori
Kurio Mifune