© Fox
Noble currently plays both eccentric scientist Walter and his sinister doppelganger Walternate in the Fox sci-fi drama.
In an official Fox interview, Nicole said: "If there is a Walter versus Walternate showdown, I would imagine that would be a finale thing [because] it's so huge."
She also repeated her co-star Noble's own claim that fans of the show "want our Walter to kick [Walternate's] ass".
"A lot of people really, really want to see it," she admitted. "But something would have to come from that, and so it makes sense that [the confrontation] would lead into our season four."
Last year, Noble admitted that he was also keen to film "a clash between the two Walters".
Fringe continues on Fridays at 9/8c on Fox.
