The BEST episodes of Circle (2017)

Every episode of Circle (2017) ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Circle (2017)!

In 2017, a student investigates mysterious incidents while aliens invade the planet. Meanwhile, in 2037, a detective investigates a murder in the alien-controlled "Smart Earth."

Last Updated: 4/3/2026Network: tvNStatus: Ended

10.00

7 votes

#1 - Episode 8

Season 1 - Episode 8 - Aired 6/13/2017

Woo Jin is cornered into helping Professor Han look for lost research. Detective Kim prepares for a possible meeting with the mysterious chairman of Human B.

Watch Now:Amazon Apple TV

9.75

8 votes

#2 - Episode 11

Season 1 - Episode 11 - Aired 6/26/2017

Woo Jin learns the truth about his father's research data, and Detective Kim learns the truth about what really happened to Woo Jin.

9.75

8 votes

#3 - Episode 12

Season 1 - Episode 12 - Aired 6/27/2017

In the final episode, Woo Jin, Detective Kim, Jung Yeon, and their crew look for incriminating evidence against Park Dong Geun to take him down once and for all.

9.70

10 votes

#4 - Episode 4

Season 1 - Episode 4 - Aired 5/30/2017

Woo Jin and Jung Yeon have a run-in with who they believe to be the culprit. Joon Hyuk and his team make a game-changing discovery about Bluebird.

Watch Now:Amazon Apple TV

9.57

7 votes

#5 - Episode 9

Season 1 - Episode 9 - Aired 6/19/2017

When Woo Jin finds Bum Gyun, Professor Han starts to make his getaway. Detective Kim and Jung Yeon become two of Smart Earth's most wanted.

Watch Now:Apple TV

9.44

9 votes

#6 - Episode 6

Season 1 - Episode 6 - Aired 6/6/2017

With new clues to investigate, Woo Jin expedites his search for Bum Gyun. In the future, Jung Yeon informs Detective Kim of someone who may know Woo Jin's whereabouts.

Watch Now:Apple TV

9.22

9 votes

#7 - Episode 5

Season 1 - Episode 5 - Aired 6/5/2017

Woo Jin becomes convinced of Jung Yeon’s otherworldliness, but she's reluctant to believe it. Detective Kim learns the true identity of Bluebird.

Watch Now:Amazon Apple TV

9.18

11 votes

#8 - Episode 3

Season 1 - Episode 3 - Aired 5/29/2017

With Bum Gyun still missing, Woo Jin teams up with Jung Yeon to look further into the suicides. Joon Hyuk proposes going to Normal Earth to access Park Jin Gyu's memories.

Watch Now:Apple TV

9.13

8 votes

#9 - Episode 7

Season 1 - Episode 7 - Aired 6/12/2017

Woo Jin and Jung Yeon are disturbed to find out their fathers are not who they thought they were. Detective Kim must accept that Woo Jin's present may be different than what he'd imagined.

9.00

10 votes

#10 - Episode 2

Season 1 - Episode 2 - Aired 5/23/2017

Woo Jin doesn't know what to believe when a disturbingly familiar student joins his class. The trust between Detective Kim and the Smart Earth employees is destroyed from the get-go.

Watch Now:Amazon Apple TV

9.00

9 votes

#11 - Episode 10

Season 1 - Episode 10 - Aired 6/20/2017

Professor Park realizes that the power lies in his hands now. Detective Kim receives new information about Woo Jin, but Human B is hot on his trail.

Watch Now:Amazon Apple TV

7.35

20 votes

#12 - Episode 1

Season 1 - Episode 1 - Aired 5/22/2017

Twin brothers Woo Jin and Bum Gyun encounter an alien as children, turning Bum Gyun dangerously paranoid as an adult in 2017. In 2037, Detective Kim and Chief Hong look for a way into a "crime-free" Smart Earth.

Watch Now:Amazon Apple TV