When did Unknown Number Season 1 Episode 18 air?
Unknown Number Season 1 Episode 18 aired on November 8, 2019.


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.
Direct answers for episode-level questions and details.
Unknown Number Season 1 Episode 18 aired on November 8, 2019.
This episode runs for approximately 45 minutes.
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