TV series
A Call from the Past, the Call for the Future
Two detectives communicate through a walkie-talkie to solve a cold case. One detective exists in the present day, and the other detective exists 15 years in the past.
Availability
Signal premiered April 10, 2018. We don't have a confirmed streaming, rental or purchase option yet.
Two detectives communicate through a walkie-talkie to solve a cold case. One detective exists in the present day, and the other detective exists 15 years in the past.
Choose an episode, then use the watch options above for the show.
Episode 1
Fifteen years after witnessing the kidnapping of a girl at school, Kento hears someone calling his name through a discarded two-way radio.
Guest stars Toshi Takeuchi, Kyoko Hasegawa, Reiko Kataoka, Aoba Kawai, Tateto Serizawa
Episode 2
Kento determines that the true culprit is a nurse named Keiko Yoshimoto, but she refuses to crack under questioning from Misaki.
Guest stars Toshi Takeuchi, Kyoko Hasegawa, Reiko Kataoka, Yui Sakuma, Hiroyuki Onoue, Toshihiro Yashiba
Episode 3
The two-way radio reconnects after the reinvestigation starts. Just as Kento had suspected, Ooyama had been part of the initial investigation in 1997.
Guest stars Yui Sakuma, Takeshi Ōnishi, Ryo Sato, Moro Morooka, Juri Manase
Episode 4
1997. Ooyama learns from Kento that the next victim will be his friend Midori. In 2018, Kento holds his breath for a favorable outcome.
Guest stars Yui Sakuma, Hiroyuki Onoue, Toshihiro Yashiba, Moro Morooka, Juri Manase, Hiroo Ôtaka
Episode 5
Kento learns that Ooyama went missing 18 years ago and was later dishonorably discharged. In 1998, Ooyama works on a certain serial larceny case.
Guest stars Akiko Aitsuki, Moeka Nozaki, Mitsuru Hirata, Ai Yoshikawa, Shunya Shiraishi, Yasuto Kosuda, Toshiyuki Kitami
Episode 6
Guest stars Akiko Aitsuki, Moeka Nozaki, Mitsuru Hirata, Ai Yoshikawa, Shunya Shiraishi, Yasuto Kosuda, Yutaka Morioka
Episode 7
Guest stars Mitsuru Hirata, Ai Yoshikawa, Shunya Shiraishi, Yasuto Kosuda, Yutaka Morioka, Tokuma Nishioka
Episode 8
Guest stars Tokuma Nishioka, Hideyuki Kasahara, Yuki Kubota, Yoshiyuki Morishita, Aina Yamada, Toshiki Seto
Episode 9
Guest stars Yuki Kubota, Yoshiyuki Morishita, Mari Hamada, Kurara Emi, Toshiyuki Kitami, Aina Yamada, Toshiki Seto
Episode 10
Guest stars Toshiyuki Kitami, Aina Yamada, Toshiki Seto
Episode information updated Jul 25, 2026
Available now in United States
These shows are available now and closely match Signal.
Kentaro SakaguchiKento Saegusa
Kazuki KitamuraTakeshi Ooyama
Michiko KichiseMisaki Sakurai
Yuichi KimuraTsutomu Yamada
Tetsuhiro IkedaShinya Kojima
Kaede AonoRika Anzai
Fuju KamioRyota Kato
Atsuro WatabeShinnosuke Nakamoto
Fuji TVJapan
Kansai TVJapan
