About
Boys II Planet is a survival show broadcasted on Mnet. It is a sequel to Girls Planet 999 and Boys Planet. Planet K premiered on July 17 while Planet C started airing on July 18, 2025. Boys II Planet is based on the themes and aesthetics of space. It consists of two programs, K and C, produced in Korean and Chinese respectively, with both programs following the same format for each contest. The show will create a twin group project, with both groups debuting at the same time. The final line-up will work in two different groups, K and C, and will also work as a complete group.
Cast
Park Dong Gyu
as Self — Contestant
Han Harry-June
as Self - Contestant
Moon Suhn Bin
as Self - Contestant
Lee Dong-heon
as Self - Contestant
Lee Leo
as Self - Contestant
Lee Sang-won
as Self - Contestant
Kim Jun-seo
as Self - Contestant
Jayder
as Self - Contestant
Yang Hee-chan
as Self - Contestant
Jeon Lee-jeong
as Self - Contestant
Wonjun
as Self - Contestant
Jo Gye-hyun
as Self - Contestant
Yoo Kang-min
as Self - Contestant
Thanathorn Rueangsuwan
as Self - Contestant
An Xin
as Self - Contestant
Chuei Li Yu
as Self - Contestant
Arno
as Self - Contestant
Geonwoo
as Self - Contestant
Sanghyeon
as Self - Contestant
Kim Dong-yun
as Self - Contestant
Seasons
Episodes
Season 1
EP. 01 PLANET K – You See The Fire? The Fire Has Been Lit
The trainees perform in front of their masters and are ranked according to a strict hierarchy: "All-Star", "Two Star" and "One Star". Participants who receive "No Star" are eliminated from the show. If participants disagree with the rating, they can take an "Extra-Test", which can either raise or lower their rating.
EP. 01 PLANET C – You See The Fire? Burning Blood
The trainees perform in front of their masters and are ranked according to a strict hierarchy: "All-Star", "Two Star" and "One Star". Participants who receive "No Star" are eliminated from the show. If participants disagree with the rating, they can take an "Extra-Test", which can either raise or lower their rating.
EP. 02 PLANET K – Stronger Energy, Let's Go and Be Confident!
Trainees are re-evaluated for their signal song performance skills and are ranked according to a strict hierarchy: "All-Star", "Two Star" and "One Star". Participants who receive "No Star" are eliminated from the show. In the second stage, for each class, the master's rating and the Star Creators' rating are added together to determine the final class.
EP. 02 PLANET C – Stronger Energy, Protect the All Star
Trainees are re-evaluated for their signal song performance skills and are ranked according to a strict hierarchy: "All-Star", "Two Star" and "One Star". Participants who receive "No Star" are eliminated from the show. In the second stage, for each class, the master's rating and the Star Creators' rating are added together to determine the final class.
EP. 03 – All Right, Here We Go (Let's Give it Our Best Shot)
EP. 04 – In the Dark Times
EP. 05 – You and Me, Just the Two Of Us
EP. 06 – It Burns Up Hotter
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