This article may contain spoilers.

After last week's surprise that Dr. Trevor Grant (James Callis) had used Jack Carter's (Colin Ferguson) cellphone to transport himself into the future, this week began to explore what effect his presence has had on present day Eureka. As if it were not damaging enough from the effects of Jack, Allison (Salli Richardson-Whitfield), Henry (Joe Morton), Jo (Erica Cerra) and Fargo's (Neil Grayston) visit to 1947, now that Dr. Grant is stuck in 2010, the unintended after-effects are being revealed.

So this episode explored what was new in the lives of our five heroes. As briefly touched upon last week: Jack returned to find that Tess (Jaime Ray Newman) had never left for Australia, Allison found that Kevin (Meshach Peters) no longer had autism, Jo found out that she and Zane (Niall Matter) had never dated, Henry discovered he was married, and Fargo was now in charge of Global Dynamics.

In a careful look at the old saying, "be careful what you wish for," everyone is slowly discovering that even if their unasked wishes were granted, it is not exactly what they wanted.

Plus, who knows what other long term ramifications are still to be revealed as time may be fractured irreparably and perhaps still unraveling. The theme for this season is clearly "fractures in time."

Life in Eureka has never been easy, but this particular storyline feels more ominous. Altered realities are never perfect and frequently hold a nasty side-effect. It will be interesting to see what further changes are brought about and how those will be addressed.

What Worked

Despite being the wrinkle in time that brings about more than anyone bargained for, the addition of Dr. Grant continues to delight. James Callis simply glistens with glee and mischievousness. Both he and his character are having a ball and the enthusiasm and excitement is infectious. He also brings a fun sense of joie de vie to the series that reinvigorates it. Whether Dr. Grant ends up being more friend or foe does not matter. The fact that he has shaken up the group dynamics of the series regulars is refreshing. It will be fun to see what impish trouble (inadvertent or otherwise) that he stirs up.

Another fascinating aspect being addressed is whether Allison's son, Kevin, deliberately sent Jack, Jo, Allison, Henry and Fargo into the past in order to cure his autism. While not yet fully explored and addressed, it is astounding that Kevin could have foreseen how their time-traveling venture would literally chemically manipulate his future self. In fact, it is mind-boggling. But it is also very cool and makes you wonder what else might be bouncing around in that little genius' brain and how much damage it might unleash if he starts messing around with the time continuum again. As a society we do not like to view children as master manipulators or big bad villains, but in the Eureka world, I suspect all bets are off. Once one has had the taste of changing the future to suit their own needs and desires, what is to prevent them from doing it again? Allison may yet rue the day when she realizes that the new and improved Kevin is perhaps not all that she wished for.

Also interesting to watch play out is how Jo deals with having to woo Zane all over again now that she has lost him in the sands of time. This turn of events has given Erica Cerra a wider range of emotions to play with and it suits her. Of all of them, she lost the most: she lost her one true love. Her grief is palpable and constant. As she stood looking at the engagement ring back at the Sheriff station where Zane had given it to her before time shifted, the look of longing and despair was touching. It is unfortunate that now that she cannot have what she wants most, that it forever denied to her. As she softly said, I loved the guy and he loved me -- once, the pain felt real. We can only hope that fate finds a way to reintroduce these lost soul mates.

As for Jack, Henry and Fargo, they too got their hearts desires -- but in unexpected ways. Jack had just realized that his relationship with Tess was not working out and was about ready to venture into a relationship with Allison, when this new reality was sprung upon him. To his credit, he is doing the right thing and standing by his commitment to Tess. He may not remember asking her to move in with him, but he is honoring that. Likewise with Henry. He was not the same man who proposed to and married Grace Monroe, but he seems to be honoring that as well -- and he seems a bit bemused by the whole idea. And Fargo, well, he got his grandest wish: he now runs Global Dynamic. He is king of the world. But I suspect that he too will wonder what the heck he is going to do in that job with the demands and pressures that position bring and it may just well bring him to a breaking point. Honor, glory, and fame all sound so desirable -- until the weight of it makes one scream for some peace and quiet and a little time to think. The novelty of it will soon wear off.

So there are some significant changes in each of their lives. Changes whether for better or worse, they are stuck with. They will have to adapt and make the best of their new lives and find ways to make it work. But the specter of the lives they lost through the cracks of time will haunt them. Memories cannot be erased and it will be cool to see them struggle with the past reality versus the new reality. Our heroes are not the type of people to calmly accept change. If it does not suit them, they will change it and no one had better stand in their way once they do.

On the lighter side, it was wonderful seeing former Sheriff Andy (Ty Olsson) again, back this time as Deputy Andy. Ty Olsson brings a level of charm and innocence to the character that makes it a perfect addition to the Eureka world. He still invokes the nostalgia of the "Wizard of Oz" with his unique combination of being the Tin Man and the Scarecrow all at once. He is the Tin Man in search of a heart -- or humanity; and he is the Scarecrow because he may be made of parts, but he has ample brains to go with it. His intuitive leaps of logic guessing that our heroes had traveled to the past only to return to an altered future demonstrated his keen intellect without sounding like he was merely reciting encyclopedia information. As a deputy-in-a-box, he is surprisingly smart, and that is a great asset in the intellectually-amped world of Eureka.

Finally, it was beautifully done having the same song playing at the end of this episode as was playing while Jack and Allison danced back in 1947. The words Ill be seeing you are in turn a promise and very prophetic of an uncertain future. With Jacks pronouncement, So this is home then -- for all of us -- welcome home, Eureka enters a new era and a new journey. It is certain to be surprising, challenging and perhaps tinged with a few regrets along the way. But it is a journey I cannot wait to embark on!

What Didn't Work

While funny enough when Jack noted, "Another day, another runaway robot," it was not so funny that it turned out to be a giant robot spider. The episode had enough to deal with without one more thing to add to the laundry list of problems. It was enough that they had to contemplate the assimilation of Dr. Grant into their world, the reverse temporal impact of the time fractures, and the deadly positronic lightening wreaking havoc around town. A runway robot was just the kitchen sink and it should have been held for another episode.

Giving Credit Where Credit Is Due

"A New World" was written by Bruce Miller and directed by Michael Robison. "Eureka" stars Colin Ferguson, Salli Richardson-Whitfield, Joe Morton, Jordan Hinson, Erica Cerra, Neil Grayston, Chris Gauthier and Niall Matter.

"Eureka" airs Fridays at 9 p.m. ET on Syfy.