Next Episode of Signal is
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
The Cold Case Squad secretly reinvestigates the Injoo gang rape case. Lee Jae Han finds out the connection Park Hae Young has to the case.
Following the trail the Section Chief left, Park Hae Young uncovers the truth behind his brother's death. Meanwhile, Cha Soo Hyun finds Lee Jae Han's radio in Hae Young's possession.
Park Hae Young is framed and arrested for the murder of the Section Chief. Cha Soo Hyun sets out to save Lee Jae Han and to find the one witness who can bring down their enemy.
Lee Jae Han is set on bringing down Kim Bum Joo, despite knowing that he's going to die, but a certain transmission is about to make all the difference.
Lee Ji Hoon(Park Hae Young)
Kim Hye Soo(Cha Soo Hyun)
Jo Jin Woong(Lee Jae Han)
Lee Je Hoon(Park Hae Young)
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