Helen Kim was a HouseGuest on Big Brother 15. She quickly formed a bond with Elissa because of their mutual motherhood. Helen started the game slowly, but after her Head of Household win during Week 3, she began to lead the house. Despite her loyalties to Amanda and McCrae, Helen knew she would have to turn against them. When Amanda caught wind of this plan, she turned the house against Helen and Elissa. In Week 9, Helen was evicted by a vote of 4–1 and placed ninth due to Judd returning to the game.
She appeared in one of Nick's videos about Big Brother and said that she was not happy to have this record because she wanted to set a record but not for most weeks spent being a Have-Not.