Wonder Beat Scramble (ワンダービートS, Wandā Bīto Sukuranburu), also known as Micro Nauts, is a Japanese science fiction anime series planned and supervised by Osamu Tezuka in his later years, which ran from April 16 to November 19, 1986, on TBS-affiliated networks.

Produced by Mushi Production, Tokyo Broadcasting System and Tokyu Agency, it was directed by Satoshi Dezaki and Seiji Arihara, with Arihara, Tsuneo Tominaga and Sunao Katabuchi serving as chief unit directors, Setsuko Shibuichi designing the characters, Yūichi Higuchi designing the mechanical elements and Ryō Yonemitsu and Hajime Mizoguchi composing the music.

Two years later, Isao's eldest son, Susumu, who lives in Nagisa City, is suddenly taken to the Phoenix Tower of the Institute for Comprehensive Health Science, where Dr. Miya asks him to join the White Pegasus, a special medical unit.

In Nagisa City, a number of residents are collapsing due to unexplained health problems, and they are to be treated by injecting the special intra-vehicle entry vessel "Wonder Beat" into the affected areas by micronizing it.

Thus begins the battle between Susumu and the rest of the White Pegasus team and the unidentified aliens who repeatedly attack the human body.