<Li> Jang Yoon - jung and Do Kyung - wan will be guest cast from episode 32 . They will fill the spot left open by the departure of Kim Jung - tae and his son Yakkung . The couple will chronicle the birth of their son . </Li> <Li> Jang Hyun - sung's agency announced on June 24, 2014 that the actor and his sons would be leaving the show due to conflicting schedule with filming his drama Ceci Bon and movie Love Wins . He and his family last appearance is episode 33 . </Li> <Li> Song Il - kook was announced on June 25, 2014 to be joining the cast of Superman along with his triplet sons . Their first episode will air on July 6 . </Li> <Li> It was announced on July 20 that Shin Ae - ra would be stepping down as the narrator of the show to concentrate on her studies in the United States . Her last episode will be the 37th . Heo Su - gyeong, who previously guest starred on the show will be taking over as the narrator . </Li>

When did the triplets join the return of superman