Unknown Number Season 1 Episode 21 Episode 21 ( Air Date 2019-11-14 ) Genre Mystery, Crime, Sci-Fi & Fantasy category. Overview "Through a mysterious Motorola phone, two detectives - one from the present, and the other from 15 years in the past - begin communicating and working together to solve cold cases.".
Unknown Number Season 1 Episode 21 Episode 21
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- Watch: Unknown Number Season 1 Episode 21 Episode 21 on CWR-CRB
- Stars: Du Chun, Li Xiaoran, Wang Tianchen, Ma Rui, Cheng Fangxu, Zhao Qianzi, Chen Ya'an
- Director: Han Zeng Guang
