Chris Harrison invites an incredulous Kaitlyn Bristowe to join the 'Dancing with the Stars' season 29 cast. She and her boyfriend Jason Tartick celebrate as Kaitlyn says yes to joining the new season. From 'Kaitlyn Bristowe,' season 1, episode 2 of The Bachelor: The Greatest Seasons - Ever.' Watch The Bachelor: The Greatest Seasons - Ever! MONDAY 8|7c on ABC, streaming, on demand, and Hulu.