Hawk's Valentine

S1, E43: On Valentine's Day, Hawk receives a mysterious, old-fashioned card with no addressee… only a cryptic poem inviting the recipient to meet on the far side of the Moon. Who could this secret admirer be? Robyn, Eagle and Raven try to help Hawk solve the mystery of the sender. Analyzing the card using their senses and investigative skills, they trace it back to Sandpiper! But who was the intended recipient…? And will the Racers bring the seemingly lovelorn couple back together for one more date?