The former Ghost Whisperer actress, 31, guest stars in the episode 'Behave' as Vicki Sayers - a woman who has been brutally raped by the same man four times over a period of fifteen years.
The episode aired for the first time in the US last night.
Love Hewitt's character is scared to death of her attacker, who has essentially stalked her for her entire life, and runs when police attempt to give her a rape kit.
But when she is eventually persuaded into speaking to police, she tells her whole horrible story, while being photographed and examined.