Double Helix S1E4 — What on Earth Did You Do to My Brother?
7.9
Double Helix•Season 1•Episode 4

What on Earth Did You Do to My Brother?

7.9/10 · 36 votesMay 16, 202642 min

Ranked #6 of 12 in Season 1•matches the season avg

Discussion

Lufeng proposes getting back together, leaving a conflicted Cheng Yichen terrified of getting hurt again.

Seasons1

Season 1 Episodes12

Cast10

Ayden Sng

Ayden Sng

Lu Feng

Lü Sitong

Lü Sitong

Cheng Yichen

Fa Xuange

Fa Xuange

Qin Lang

He Jiashu

He Jiashu

Cheng Yichen

Li Keyi

Li Keyi

Zhuo Lan

Yang Kexin

Yang Kexin

Lu Yu

Miao Jingou

Miao Jingou

Zhu Sha

Chou Ziyi

Chou Ziyi

Zhou Cheng

Yang Qi

Yang Qi

Ding Ding

Loong Jiayu

Loong Jiayu

Ke Luo

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Episode Summary

"What on Earth Did You Do to My Brother?" is episode 4 of Double Helix season 1. It scored 7.9/10 from 36 votes, ranking #6 of 12 episodes this season (season average 7.9). It aired on May 16, 2026.