Close Your Eyes Before It's Dark (Chinese: 天黑請閉眼; pinyin: Tiān Hēi Qǐng Bìyǎn) is a 2016 Taiwanese mystery thriller created and produced by TTV. Directed by Ke Zhen-Nian and Chen Yu-hsun, it is the fourth installment in the anthology series Qseries and premiered on December 30, 2016.

The series revolves around eight friends who were classmates and members of the mountain-climbing club from ten years ago and their venture into a mountain to uncover truths from the past. The ensemble and supporting cast include Bryan Chang as Lu Bo-Cang, Jian Man-shu as Jung Xiao-Tong, Yen Tsao as Chou Ruo-Qing, Sun Ke-Fang as Liu Cheng-Fang, Allen Chen as Lan Yi-Cong, Jake Hsu as Li Zi-Shuo, Chu Sheng-Ping as Huang Yu-Xiu, Lan Ya-Yun as Bai Xin-Yi, Huang Shang-Ho as Wang Guang-Wei, and Huang Di-Yang as Chen Ya-Zheng. Filming took place primarily in Miaoli, Taiwan.