In Gods and Monsters, needing to connect with the only real family he has left, Jack pays a visit to his grandparents, pretending to be a friend of Kelly's. The Klines invite him inside their home and share photo albums of Kelly. They tell Jack they haven't heard from her in a long time, believing her to have gone traveling due to her work in the government. Mrs. Kline tells Jack they knew Kelly was pregnant, but didn't push her for details. Jack confirms that Kelly had a baby boy, to the Klines' delight. He goes on to tell the Klines what kind of mother Kelly was, which leads to Mrs. Kline noting how much Jack looks like their daughter. As Jack prepares to leave, Mr. Kline asks if he sees their daughter to tell her they miss her, before Mrs. Kline tearfully embraces Jack with a goodbye hug.
In Moriah, wishing to have a talk with his grandparents, Jack pays a visit to the Kline's home. She denies Jack's request for a chat. Instead she begins to confront him, telling him she and her husband looked into him. They found that no one who worked with Kelly had heard of him, and that Kelly wasn't on a secret mission but is presumed dead. She angrily demands that Jack tell her what happened to her daughter, causing Jack to scream at her to stop as his eyes glow gold. Startled by what she sees, she stops yelling and asks Jack what he is, but does not get a response as the angry Jack walks out the front door. Jack later told Castiel of this, while admitting he kept his cool.
- The subtitles in the episode Moriah called her Helen.