Signal Characters

Characters played by Lee Jehoon

• Park Hae-yeong

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Characters played by Kim Hye-su

• Cha Soo-hyeon

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Characters played by Cho Jin-woong

• Lee Jae-han

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Characters played by Kim Won-Hae

• Kim Gye-cheol

Characters played by Hyun-Sung Jang

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Characters played by Son Hyeon-ju

• Jang Young-chul

Characters played by Lee Sang-Yeob

• Jin-Woo

Characters played by Seok-yong Jeong

• Oh Gyung-tae

Characters played by Ha-bok Yu

• Yeo Jin's father

Characters played by Na-ra Lee

• Shin Da-hye

Characters played by Eun-ah Seo

• Yoo Seung-yeon

Characters played by Ki-Cheon Kim

• Lee Chun-goo

Characters played by Yeon-ah Oh

• Nurse Yoon Soo Ah

Characters played by Yeon-a Oh

• Yoon Soo-ah

Characters played by Seo Ji-Hoon

• Jang Tae-Jin

Characters played by Shin Moon-Sung

• Detective

Characters played by Kim Kyeong-min

• Seo Young Jin's husband

Characters played by Lee Jae-Eun

• Market stall owner

Characters played by Eun-yeong Park

• Student's mother