“Don't work, don't get caught.”
When a judicial apprentice goes behind bars while on an undercover job, he plays the hand he’s dealt to survive prison and get his payback.
5 landscape wallpapers · click any to open Mac Mode
Explore wallpapers from films starring the Insider cast
16 featured
Kang Ha-neul
Kim Yo-han
Lee You-young
Oh Soo-yeon
Heo Sung-tae
Yoon Byung-wook
Kim Sang-ho
Mok Jin-hyung
Kang Young-suk
Jang Seon-oh
Park Seong-geun
Hong Sang-wook
Kang Shin-hyo
Hong Jae-seon
Jeong Man-sik
Yang Hwa
Kim Si-eun
Park Ro-sa
Sung Ji-ru
Heo Sang-soo
Cha Yeob
Kim Gil-sang
Yoon Byung-hee
Kim Woo-sang
Lee Dong-won
[Seongju Prison inmate #1321]
Moon Sung-keun
Do Won Bong [Seongju Prison inmate]
Heo Dong-won
Yang Jun ['Skin Nation' chairman]
Choi Dae-hoon
No Seung Hwan / Nam Dae Moon [Seongju Prison inmate]
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Last updated: June 9, 2026
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Quick answers about Insider wallpapers, cast, and downloads.
Moviely has 5 free Insider cinematic wallpapers available to browse, preview in Mac Mode, and download.
Yes. Every Insider backdrop on Moviely is free to preview and download for personal desktop or mobile wallpaper use.
Insider wallpapers include 4K and HD options. Moviely recommends the best size for your screen and offers original-quality downloads when available.
Yes. Open any Insider wallpaper in Mac Mode to preview it on a desktop or iPhone lock screen before downloading.
Open the Insider page, pick a backdrop, choose your preferred resolution (HD, Full HD, or Original), and click Download.
Yes. Select Insider backdrops are available in 4K / original quality for high-resolution displays.
Insider first aired in 2022. Moviely hosts cinematic wallpapers captured from the TV series's official backdrop imagery.
Insider is categorized as Action & Adventure, Drama.
Min Yeon-hong directed Insider.
Insider stars Kang Ha-neul, Lee You-young, Heo Sung-tae, Kim Sang-ho, Kang Young-suk, and more.
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