Which South Korean reality-variety show that airs on KBS2 was moved in 2013 from Wednesday nights and replaced by Star Family Show Mamma Mia?
Happy Sunday:  On November 3, 2013 "Star Family Show Mamma Mia" was moved to Wednesday nights and replaced with "The Return of Superman". The Return of Superman (TV series): The Return of Superman (; also known as Superman Is Back) is a South Korean reality-variety show that airs on KBS2.
The Return of Superman