Hassie Harrison Courtesy Hassie Harrison (Yellowstone) is the latest cast in a series regular role in the new Baywatch TV series from Fox and Fremantle. Harrison will play Nat, a former foster kid turned Olympic athlete who is the gold standard when it comes to lifeguarding. Brilliant, driven, and fiercely loyal, she's the right hand and closest friend of protagonist Hobie Buchannon (Stephen Amell). Nat holds everyone to the same high standards she has for herself, which sometimes gets in the way of her relationships on and off the beach.