"The Blood" Season 9, Episode 4

Kramer closes his account at the blood bank, so begins storing his own blood in his fridge. Jerry gets a cut near his jugular and so his parents worry he's not taking care of himself; they enlist their friend, a wizened fitness trainer, to whip Jerry back into shape. George attempts to combine sex, food, and television into one event. Elaine is insulted when her friend doesn't ask her to babysit her son. She soon wishes she'd never wanted the job.