October 11, 2018 • 1h
Guests: Han Ji-min
November 22, 2018 • 1h
Guests: Chae Yeon, Choi Jung-won, Kwon Hyuk-soo, Ham Yeon-ji, Park Si-eun. Special MC: Yook Sung-jae (BtoB)
December 20, 2018 • 1h
Guests: Oh Ji-ho, Lee Si-young, Jeon Hye-bin, Lee Chang-yeop [ko], Kim Ji-young
January 3, 2019 • 1h
Episode 13 of Happy Together Season 4 premiered on January 3, 2019
January 10, 2019 • 1h
Episode 14 of Happy Together Season 4 premiered on January 10, 2019
February 14, 2019 • 1h
Episode 19 of Happy Together Season 4 premiered on February 14, 2019
February 21, 2019 • 1h
Episode 20 of Happy Together Season 4 premiered on February 21, 2019
February 28, 2019 • 1h
Guests: Jo Bin (Norazo), Kim Ho-young [ko], Hong Jin-young, Jeon So-min, Park Yoo-na
August 29, 2019 • 1h
Episode 47 of Happy Together Season 4 premiered on August 29, 2019