The BEST Episodes of Threshold

Every episode ever - ranked by fan votes!

Last Updated: Sep 26, 2019

Network: CBS

Threshold, from producers David Heyman, David Goyer, and Brannon Braga, and written by Bragi Schut, revolves around a female government contingency analyst who leads a team of scientists and military personnel who get in contact with a mysterious alien lifeform.


#1 - Vigilante

Season 1 - Episode 12

When a number of infectees and seemingly innocent people are killed, it becomes apparent that someone is going after people affected by the alien signal, and is locating them via their heightened brain waves. How is the killer linked to Bighorn crewman Manning, and does his method of finding his victims mean that Molly, Cavennaugh or Lucas could be next on his list?

star 7.89
55 votes
Writers: Mike Sussman
Outbreak (a.k.a. Escalation)

#2 - Outbreak (a.k.a. Escalation)

Season 1 - Episode 11

Lucas is infected with the alien DNA from something he ate. The infectees have harvested crops with the alien DNA. Caffrey must find a way to stop what could be nearly 200 new infectees. Also, one of the aliens approaches her with an interesting revelation.

star 7.65
54 votes
Writers: Dan O'Shannon
Trees Made of Glass (2)

#3 - Trees Made of Glass (2)

Season 1 - Episode 2

Gunneson reappears in Caffrey's house. Meanwhile, Lucas, Nigel and Ramsey try to break down how the alien signals and DNA operate and come up with some interesting theories. Cavennaugh's team tries to locate Gunneson other shipmates.

star 7.60
71 votes
Directors: Peter Hyams
Writers: Brannon Braga, David S. Goyer

#4 - Revelations

Season 1 - Episode 8

Molly and Cavennaugh discover some strange happenings in a missing Big Horn crew member's hometown when they investigate the disappearance of a Threshold field agent.

star 7.60
64 votes
Writers: Andrew Colville, Amy Berg
The Crossing

#5 - The Crossing

Season 1 - Episode 10

Molly and Baylock realize the Threshold detainees must be moved immediately to a more secure facility in West Virginia when a prisoner attacks and infects a security guard, then tries to break himself and other infected prisoners out of their cells.

star 7.59
58 votes
Directors: Paul Shapiro
Writers: Bragi F. Schut
The Burning

#6 - The Burning

Season 1 - Episode 4

A patient at an psychiatric hospital in Ohio escapes and Molly believes he may have been infected by the alien signal after paintings of glass trees are found in his cell. After further investigation, it is suspected one of the missing Big Horn crew might be involved.

star 7.56
66 votes
Writers: Brannon Braga, Dan O'Shannon

#7 - Alienville

Season 1 - Episode 13

Molly Caffrey and Cavennaugh go out to a town call Allenville in search of a Doctor who they think is infected and find more then they were looking for. Meanwhile things at threshold get heated with the pregnancy of the infected woman coming to an end.

star 7.56
52 votes
Directors: Oz Scott
Writers: Anne McGrail

#8 - Progeny

Season 1 - Episode 9

When three women from completely different walks of life appear to be infected, Molly and the Red Team discover the connection among them and must locate the common cause.

star 7.54
54 votes
Directors: David Jackson
Writers: Barbara Nance
Blood of the Children

#9 - Blood of the Children

Season 1 - Episode 3

When a man at a fast-food restaurant is found with his head imploded, Molly and her Red Team investigate and begin to suspect the involvement of a group of military cadets, and the discovery that the infection has spread beyond the original Big Horn crew.

star 7.51
78 votes
Directors: Bill Eagles
Writers: Anne McGrail

#10 - Pulse

Season 1 - Episode 6

As the signal from the Big Horn invades a Miami rave, the team investigates who have been infected, trying to prevent the signal from spreading to the population.

star 7.49
59 votes
Directors: Bill L. Norton
Writers: Mike Sussman

#11 - Shock

Season 1 - Episode 5

After a shipyard gang bust, a suspected fugitive Big Horn crewmember kills a police detective. Molly and Cavennaugh go undercover as Homeland Security agents. Unbeknownst to them, the real Homeland Security department is on the case.

star 7.44
64 votes
Directors: Tim Matheson
Writers: Andre Bormanis
Trees Made of Glass (1)

#12 - Trees Made of Glass (1)

Season 1 - Episode 1

A mysterious alien object attacks a Naval ship and crew. Dr. Molly Anne Caffrey, a government contingency analyst, is contacted by the Deputy National Security Advisor, J.T. Baylock, to investigate the incident along with a special scientific team of her choice.

star 7.43
107 votes
Directors: David S. Goyer
Writers: Bragi Schut
The Order

#13 - The Order

Season 1 - Episode 7

Molly and Cavennaugh investigate a newspaper leak regarding the Threshold program which might turn out to be an inside job. The Red Team look into a case of residents of a small town dreaming of trees made of glass.

star 7.36
58 votes
Directors: Norberto Barba
Writers: Anne McGrail