Bolting out of the gate, horses accelerate from 0 to 40 mph in a few seconds. This documentary series moves at a more comfortable gallop as it introduces seven jockeys heading into the annual Oak Tree Meet at the Santa Anita track in Arcadia, Calif. The most interesting characters so far are a likeable young breakout star, Joe Talamo, and a Canadian rider named Chantal Sutherland, who's in a relationship with another jockey, Mike Smith. The horses—often paired with a jockey only shortly before the race—are more enigmatic, although the premiere includes a beautiful sequence of one animal breaking free and running off. Was it proud or panicked?