This article may contain spoilers.

Between Dr. Old Spice and the one crappy rule "we can't tell anyone," the pressure was on Jack (Colin Ferguson) and Henry (Joe Morton) to make a declaration of love. True love should not be so hard. But in Eureka it is perhaps the most elusive of all mysteries. It was time for Henry and Jack to finally step up and declare themselves to the women they love -- particularly as Jack has been in love with Allison (Salli Richardson-Whitfield) for the past 4 years and Henry has just discovered that he is falling in love with Grace (Tembi Locke). For better or worse, they embraced their lives and chose to tell Allison and Grace how they felt. Alas, the road to happiness is a bit rocky and neither was so easily swept off their feet. So as Jack and Henry struggled with how to woo and win the women of their dreams, Eureka struggled with yet another tricky scientific dilemma: people were literally turning into stone.

Zoe (Jordan Hinson) must really wonder if Eureka is a town blessed by brilliance or cursed with all the catastrophes that seem to erupt when she is around. Just visiting the dig site to Jo's (Erica Cerra) new house set off a chain of events nearly claiming several lives simply because they were exposed to an altered perm solution, which the scheming Dr. Derek Thurgood (John Reardon) sprayed on the dig site to falsify the carbon dating of the bone fragment he planted there. It was fitting that he became the first victim of his own shenanigans, but unfortunate that Zoe and some other innocent bystanders got caught up in it too.

With some good old-fashioned investigative work, Carter and Jo were able to ascertain what caused the deadly mixture and how to reverse the effects. Alas, solving their romantic problems was not so easy. Science is easy, love is hard.

The real problem was whether one should stick with a safe, but dull guy versus risking love with someone new and exciting. For Zoe and Grace, new and exciting won the day. Fortunately for Jack, Allison was willing to stick with tried and true. Charles Grant (James Callis) may be the new guy and he is exciting on the surface, but Jack is definitely the tortoise in this race with Charleshare routine. Slow and steady won in his case. It remains to be seen if Zoe and Graces choices will be as satisfying.

What Worked

First of all, the "Doctor Who" shout-out was AWESOME! Zane's (Niall Matter) quip, "Anything else you want while I'm in there? Launch codes, defense plans, TARDIS blueprints?" was a super cool nod to the Whovians who watch "Eureka." All the Terminator references in the earlier episodes were easy to catch, but only a finely-tuned fan would catch Zanes quick quip.

Plus, this was the episode that fans had been waiting for, Jack and Allison finally got their moment to talk about how they felt about each other. Having braved two alternate time lines, as well as time travel to the future and the past, if anything we know for sure, Jack loves Allison. So it was cheer-worthy when he finally got up the nerve to ask her on a date and he asked himself, "Why did it take me 4 years to do that?!"

Though Jack was later flummoxed to find out that Allison did not realize it was a date and when Jack asked her why she thought Charles invitation to dinner was a date, but not when he asked her. In response to his query, "Why not me?" Allison said, "(A) You've never asked me for a date [and] (B) you kissed me and acted like it never happen -- I know you had to come back to Tess, but seriously, it's been over a month." But hearing the one thing that made all the difference, Jack smiled and said, "Hold, hold on. You really thought about the kiss?" Allisons answering grin and her flippant response, "It's been over 60 years, I don't know. Who can remember?" was music to Jacks ears as he exclaimed, "You thought about it!"

Later when Jack asked her, "Zoe says if it starts in the friend-zone, it should just stay in the friend-zone, do you think that's right?" Allison evasively replied, "I think good friends are hard to find. Jack then asked, "So you think the kiss was a mistake?" To which Allison explained, "No, I think what we have is really special and if things didn't work out between us -- especially after everything we've been through -- what I'm trying to say is maybe it's not worth the risk." But it was to Jack. He knows that after 4 years, if he sits by and does nothing, losing Allison to another man again will hurt too much. This was his moment and he was taking it. Between sweeping Allison off her feet and hovering over Zoe like the protective father he is, this was a night for Jack Carter fans. He was the dashing hero saving the day and getting the girl in the end. All was well in Eureka!

Another big moment was watching Henry try to win Graces love. His alternate timeline self had done it, so he knew it was possible. Alas, alternate-Henry thought exactly like he did and Henry was merely mimicking himself -- all his best moves had already been used. So competing with himself was an even harder hurdle than what Jack had to face. In frustration he told Jack, "I just want to give her the passion and surprises she deserves, but you know, anything I come up with, he's probably already done." To which Jack sagely replied, "It's hard to win a girl when you're competing against yourself and Henry dejectedly replied, "Exactly."

It was interesting advice when Jack recommended that Henry go to the one person he would be least likely to ask for advice so that it would result in something new and different. Fortunately, Henry took that advice and went to Fargo (Neil Grayston) who got him to sing and dance for Grace -- it was something that prior-Henry probably did not do. Plus, watching Joe Morton perform "She Blinded Me With Science" was just a delight. He enchanted the fans, just as much as Henry delighted Grace. She was clearly touched by his ability to still surprise her.

The third love story playing out was unfortunately not between Jo and Zane. Alternate-Zoe had somehow been swayed by Zanes charms and was tentatively embarking on a romance with him -- much to both Jo and Jacks horror. It was bad enough that Jo came back to find that she and Zane had never even dated, but then to discover that Zoe was interested in him was too much to bear. The feeling of betrayal felt palpable when Jo told Jack, "[Zoes] new guy is my old guy!" Jacks reassurance, "I keep telling myself it's a crush and it's not going to last, did not assuage Jos pain. When she heart-brokenly cried, "What if it does?" our hearts broke with her. Jo's advice to Zoe that "life's short and everything can change in a blink" was well-intended, but she never once imagined that she was pushing Zoe right into the arms of her beloved.

To counter-balance the relationship dilemmas, on the sidelines was an even more interesting mystery developing involving Dr. Charles Grant. His DOD personnel file was flagged by the IRS and it spooked not only him, but Fargo and Jo who could be held accountable for violation of an untold amount of national security protocols for creating Charles a fake identity. The delivery of the fruit basket with the wine from 1947 was spine-tingling as it suggested that not only does someone know exactly who Charles Grant is, but also that they perhaps have something sinister in mind. However, finding out who was behind it was even more hair-raising. With just one line, our hearts stopped, "My name is Beverly Barlow (Debrah Farentino) and we have been waiting a very long time for you." This dish is definitely better served cold!

What Didn't Work

It still feels a bit unsatisfying that we have not yet been introduced to Allisons manny. After dropping that juicy morsel in the first episode of this season, it has been a dangling carrot for far too many episodes. What are they hiding from us?

Also why were Charles and Zane M.I.A. during the petrification problem? Surely, Charles would have been fascinated to work on such a problem and Zane would have had a personal stake as well since he is now interested in Zoe.

Giving Credit Where Credit Is Due

"Stoned" was written by Eric Wallace and directed by Joe Morton. "Eureka" stars Colin Ferguson, Salli Richardson-Whitfield, Joe Morton, Jordan Hinson, Erica Cerra, Neil Grayston, Chris Gauthier, Niall Matter, and Trevor Jackson.

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