This article may contain spoilers.

Stepping away from some of the nice character building episodes of late, this week offered us more standard "Eureka" fare with the collision of two scientific procedures: Tess' Time Capsule Project versus the annual Global Dynamic sonic-cleaning.

Tess (Jamie Rae Newman) had been entrusted with gathering the significant memories of all the residents of Eureka in order to preserve them for posterity (though I personally believe it was her way of checking out what had happened in Eureka before she got there). So small hand-held glowing globe devices -- aka, story-catchers (or more aptly named "snow globes" by Zoe) -- were given out to everyone to recount the most significant memories of their experiences in Eureka. But, after Carter (Colin Ferguson) teased him about what people would remember about him, Fargo (Neil Grayston) snuck into Tess' lab to be a bit of a "peeping Tom" and see what everyone thought about him.

Unhappy with the captured memories, Fargo deletes the memories and inputs his own choice memories. This proved to be disastrous as the delete-option actually deleted the memories from each person as they were still neuro-connected to the mainframe.

Simultaneously, Global Dynamic had been evacuated for the sonic-cleaning which was a sonic sterilization process that liquidated anything biological -- including humans. After Carter and Allison (Salli Richardson-Whitfield) became trapped in Tess' lab, while the initiation sequence for the sonic sterilization had began, it became a race against the clock to save them.

What Worked

Jack and Allison were again the adorable-couple-of-the-week as this time they were on countdown to the arrival of baby Jenna. Allison's quiet statement of "I'm really happy you're here," followed by Jack telling her, "I will always be here for you -- no matter what" was just heart-melting. It was no less touching when Allison finally realized that Jack will do literally anything for her and said; "Now this isn't how I pictured it going for us."

Yet Jack just capped it all off with, "Yeah ... bad timing." Through it all Jack showed loving concern and steadfastness for Allison and Jenna. Whether they all want to admit it yet or not, Jack has stepped into the role of father/caretaker. It was even more beautiful and touching that Zoe was there to be a part of it all, thus making it picture-perfect with Jack, Allison, Zoe and Jenna being there to complete the circle of love. And it was telling that Fargo and Tess were present, but somehow still excluded from that familial moment - they were but mere observers.

Nicely interwoven into the episode was a good bit of humor, accentuating the comedy in losing one's memories. For example, Tess forgot about Jack and introduced herself to him with, "Hi, I'm Tess and you are?" Jack's look of horror was priceless as he realized that their last chance at stopping the sonic-sterilization process was gone, and simply responded, "Totally screwed." It was a perfectly set up punch-line that led to the powerful kiss Jack gave Tess in a desperate attempt to jump-start her memories. Lucky for all of them, that worked.

Another fun comedic moment was when Allison was astounded at Jack's knowledge of a scientific process, and exasperatedly asked, "Who told you that?" To which Jack said, "You ... before you started losing your memory." She then capped it all off with the startled exclamation, "Oh, my God! When did that happen?" when she saw her pregnant stomach.

It was also a nice walk down memory lane to watch Fargo and Allison put on the halo device and see what key memories were stored in the time capsule database. It reminded us of Fargo's well-meaning but clumsy mistakes and his dreams of sweeping Jo (Erica Cerra) off her feet, and it also reminded us how Jack and Allison met and became closer through each fun-filled adventure. The entire situation was a touching tribute to Nathan Stark (Ed Quinn) whose absence has been keenly felt this season. Finally, for the newer viewers, it was a nice recap of how we got to where we are now as Eureka revs up towards its third season finale.

What Didn't Work

After such a recent loss by Henry (Joe Morton), it would have been appropriate to use this episode to show how relieving it was for him to forget about Kim 2.0's death and sacrifice. It would have been a nice contrast to emphasize that there can be a plus-side to selective memory loss, and not just Fargo wanting to forget having been present for the birthing process.

Giving Credit Where Credit Is Due

"Eureka" stars Colin Ferguson, Salli Richardson-Whitfield, Joe Morton, Jordan Hinson, Erica Cerra, Neil Grayston, Chris Gauthier and Niall Matter. "You Don't Know Jack" was written by Eric Wallace and directed by James head.

"Eureka" airs Fridays on Syfy.