Wormholes randomly materialize around Eureka as the Department of Defense is set to shut the town.

The people of Eureka are being kidnapped and replaced by body-doubles one by one unless Allison, Fargo and Zane can figure out how to avoid capture and save their town.

When Allison’s genius older brother comes to meet her new husband, Carter feels the pressure of not being smart enough to measure up.

Carter’s romantic surprise for Allison turns deadly when they’re trapped in a sinking marine lab with time and oxygen quickly running out.

Beverly Barlowe resurfaces in Eureka seeking Carter’s help to free the Astraeus crew, and the rescue plan lands Carter in the crew’s virtual world.

The town huddles in a last attempt to locate the vanished Astraeus before it’s too late!

The quaint town of geniuses is transformed into animated versions of themselves. Sheriff Carter and Allison Blake are secretly planning the perfect holiday surprise for their kids. But a mysterious…

In the season finale – It’s chaos in Eureka when an energy beam rips through main street but the Astraeus launch must go on…with or without Eureka intact.

When Sara gives Andy a (as Zane calls it ) an EMO download to give him emotion, she inadvertently affects all Level 6 AIs. Including Tiny. She escapes while being…

It’s space week in Eureka, and everyone is gearing up for the rocket race – except for Carter. General Mansfield is in town for the big Race to the Moon,…

When the 5 get back to their time, things are changed everywhere. As the Henry tries to fix the machine that transported them in the first place, Dr. Grant is…

It’s Founder’s Day in Eureka and everyone is in the spirit of the celebration until Jack, Allison, Henry, Jo and Fargo are transported back to 1947 where they meet some…

Ruby gets scammed and Dre begins to suspect that she isn’t as sharp as she used to be, particularly because she was the one who used to scam other people….