This Is Us: Jack Pearson and wife-to-be Rebecca kiss on first date on season three premiere

Jack Pearson witnessed Rebecca kissing another man during the season three premiere on Tuesday of the NBC drama This Is Us. Flashback scenes showed the couple's first date and first kiss, but as they continued their courtship Jack saw his wife-to-be locking lips with someone else. First date: Jack, played by Milo Ventimiglia, was shown going on his first date with future wife Rebecca on Tuesday during the season three premier of This Is Us 'The tests show you have PCOS, it could be linked to your weight and causing fertility problems,' her doctor told her. Second chance: Toby and Kate later were given a second chance by their fertility doctor Flashbacks showed a young Jack watching in awe as Rebecca sang Cat Stevens' Moonshadow at an open mic night.