Navi Rawat and David Krumholtz, Numb3rs

After overcoming multiple kidnappings, outside entanglements and disapproving families, Numb3rs' Charlie (David Krumholtz) and Amita (Navi Rawat) are finally getting their happy ending.

But the couple's long-awaited wedding in Friday's Season 6 finale (10/9c, CBS) is overshadowed by the ever-growing possibility that the show won't be back after the honeymoon's over. Earlier this season, CBS' math-driven procedural had its episode order reduced by six hours. The result:  Writers scrambled to produce an ending that could double as a series finale.

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Plans for Charlie and Amita's ornate wedding went out the window. Instead, the couple gets hitched — where else? — at CalSci, just days before they are to depart for a visiting professorship at Cambridge University. Considering the circumstances, the change of plans is fitting, Krumholtz tells TVGuide.com.

"It was an unintended wink," Krumholtz says. "It was really important for the writers to do it in a way that didn't feel false. ... It's fitting with what we've established the show to be. It's a show about characters and the intimate relationship between a group of people. So instead of having 200 people at their wedding, there's only five or six people. It's actually really kind of sweet because it's all about the cast.

"It's a nice way to end things because the show has always been that little engine that could — the Friday night show that no one thought would make it," Krumholtz says. "In the end, the wedding, which is the most formulaic generic exploitative TV thing Numb3rs has ever done, was small as well. It's a cute little wedding on a cute little show."

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The wedding kicks off the episode, leaving plenty of time to solve one potentially last crime. Don (Rob Morrow) loses his gun when making an arrest, and it's used soon after in a double murder. Despite Don's protestations, Charlie insists on helping his brother find the gun.

"Charlie is not going to get on a plane knowing that somewhere out there, someone is carrying around his brother's gun," Krumholtz says, adding that Charlie is also torn about leaving behind his work with the FBI. "Charlie is concerned with passing the torch to someone and not leaving the FBI in a lurch. Charlie's emotional journey is really more about looking back on the work he's done for the FBI and seeing how it's changed him. It's about making peace with it and moving on."

Charlie ends in a good place with Don as well. "In the beginning, they were two brothers on opposite ends of the spectrum, not really understanding each other," Krumholtz says. "The FBI work over the years has brought them together and given them a mutual arena [in] which to find camaraderie and form a bond. Nothing's really different: They're still brothers who hang out with their dad a lot. Everything's pretty much the same, except so much has changed. That's life and it's a nice sentiment."

Closure is evident in most every story line, including those of Larry (Peter MacNicol) and David (Alimi Ballard). And a familiar face turns up for a goodbye salute.

"The episode kind of lets you know where these characters will be and how they end up," Navi Rawat says. "So if the series is canceled, it's not going to be a shock. It's nice for our fans, because I think they will get a sense that these people will go on and have a happy life and get better from everything they've learned over the years."

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As for speculating about Charlie and Amita's future, Rawat doesn't think much will change, especially as it relates to having kids. "I don't think it would go in that direction right away," she says. "They've always been focused on their careers and that's kind of what brought them together. I feel like it would continue to be more of the same: focusing on the crime and the school world.

Krumholtz has a slightly cheerier outlook: "I think they'll probably plan everything mathematically," he says. "If I could write the story line, I'd say they go off to Cambridge, and really fall in love with that university and that lifestyle. Then, they would move to London, have and raise kids in London, and maybe join the British version of the FBI or Secret Service."

Coming next season to CBS, a Numb3rs: London spin-off? "I should be pitching this," Krumholtz says with a laugh.

"You really do get the sense at the end of the episode that life goes on," he adds. "I think it's a bit of a tear-jerker for our fans.

"The hardest part is the last moment of the episode: Don and Alan (Judd Hirsch) are bickering and Charlie is watching, and the camera just pans away and fades out," Krumholtz says. "You really get the feeling like you're missing something; you wish it would keep going. I think that's what the creators intended. They wanted to leave people wanting more."