Watch Eureka Season 4 Online
Watch Eureka Season 4 full episodes online, free and paid options via our partners and affiliates.
![Disney Style Animation on Eureka](https://tv-fanatic-res.cloudinary.com/iu/s--o6Tiy-Wp--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371225085/animated-on-eureka.png)
Eureka airs a special holiday episode this week. A VERY special, unusual holiday episode, that is.
![One Giant Leap Scene](https://tv-fanatic-res.cloudinary.com/iu/s--g6pHmedk--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222942/one-giant-leap-scene.png)
It's time to launch! Read on for a review of the season 4.5 finale of Eureka.
![Lab Problems](https://tv-fanatic-res.cloudinary.com/iu/s--WrCOo_2e--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222508/lab-problems.png)
There's a malfunction in the Astraeus loading area this week. Andy is in serious trouble as a result.
![Warning!](https://tv-fanatic-res.cloudinary.com/iu/s--ifUwncjb--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222275/warning.png)
The Astraeus candidates are evaluated by Senator Wen this week. Elsewhere, we're witness to a series of bizarre attack around town.
![Wallace Shawn on Eureka](https://tv-fanatic-res.cloudinary.com/iu/s--1JjQZESy--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222141/wallace-shawn-on-eureka.png)
An auditor arrives in Eureka this week. His job? To assess Jack and Allison's romance.
![Elevator Shaft!](https://tv-fanatic-res.cloudinary.com/iu/s--Gs9ML__7--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222022/elevator-shaft.png)
Ming Ga guest stars as Senator Wen on this episode of Eureka. It focuses on something that's literally eating through Global Dynamics.
![Return of Jo and Zoe](https://tv-fanatic-res.cloudinary.com/iu/s--1CQfrvnn--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371221880/return-of-jo-and-zoe.png)
Ming Na guest stars on this episode of Eureka. It features Jo and Zoe returning to find the town in a bad spot.
![Up in the Air Scene](https://tv-fanatic-res.cloudinary.com/iu/s--n-PPIMP2--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371221709/up-in-the-air-scene.png)
The town runs into a problem when the entire bank is stolen. Read on for a full recap.
![The Eureka Crew](https://tv-fanatic-res.cloudinary.com/iu/s--MEVhft9D--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371221577/the-eureka-crew.png)
Carter and Lupo test a new crime fighting prediction tool that predicts the destruction of Eureka.
![Greetings, Dr. Holly Marten](https://tv-fanatic-res.cloudinary.com/iu/s--LrYg8Bgq--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371221446/greetings-dr-holly-marten.png)
Felicia Day debuts on this episode of Eureka. Elsewhere, Carter must deal with Allison's kids when she leaves town.
![Carter in his Car](https://tv-fanatic-res.cloudinary.com/iu/s--SFfBhrcJ--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371220908/carter-in-his-car.png)
What could a town of geniuses not see coming? That's the question on this season premiere of Eureka.
![A Eureka Christmas](https://tv-fanatic-res.cloudinary.com/iu/s--LNACyPl2--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371216515/a-eureka-christmas.png)
Carter has trouble getting into the holiday spirit this week, especially due to a force field surrounding the town. Elsewhere, Fargo organizes the GD Christmas party.
![SyFy Promo Pic](https://tv-fanatic-res.cloudinary.com/iu/s--H4Uu66uU--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371213212/syfy-promo-pic.png)
Grant and Carter become stranded on this week's mid-season finale. As a result, they must race back in time to save Eureka.
![Carter](https://tv-fanatic-res.cloudinary.com/iu/s--M0b2O0ne--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371212972/carter.png)
Individuals from the past come back to haunt the lives of Carter and the gang on this week's episode. Aptly, the hour is titled "The Ex-Files."
![Stoned Scene](https://tv-fanatic-res.cloudinary.com/iu/s--zN2qP4Cc--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371212710/stoned-scene.png)
As always, we've recapped this episode of Eureka in fun detail. The installment is titled "Stoned."
![Momstrosity Scene](https://tv-fanatic-res.cloudinary.com/iu/s--oGLO73C3--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371176249/momstrosity-scene.png)
Carter goes camping with Kevin, and Henry this week and wants to come clean with Grace. As this is taking place, a strange relationship threatens Eureka.
Claudia Donovan visits Eureka this week. Her goal? To see whether or not Fargo's promises of wondrous devices are true. We've got a full recap.
![Jamie Kennedy on Eureka](https://tv-fanatic-res.cloudinary.com/iu/s--Q2echhj7--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371164541/jamie-kennedy-on-eureka.png)
Jamie Kennedy guest stars on this episode of Eureka. He plays a character named Dr. Ramsey and he interacts with Dr. Grant.
![Douglas Fargo](https://tv-fanatic-res.cloudinary.com/iu/s---4m3p7nV--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371164429/douglas-fargo.png)
Dr. Isaac Parrish is the focus of this week's Eureka episode. He infects everyone with a major fury and endangers various characters, especially Fargo.
![Eureka Scene Pic](https://tv-fanatic-res.cloudinary.com/iu/s--KO8BZayG--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371164247/eureka-scene-pic.png)
The Founder's Day festivities continue this week. As they do, Carter and everyone else must accustom themselves to the new time line and how Dr. Grant fits into it.
![Eureka Scene](https://tv-fanatic-res.cloudinary.com/iu/s--zbohgDXH--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371164134/eureka-scene.png)
Welcome to the fourth season of Eureka. James Callis debuts on this episode, a recap of which follows. Read on and enjoy!