Scott Foley, who plays Jake Ballard on the series, told ABC News that he "heard it was just changed days ago, too," but has "no idea what was changed, [or] what she did in the editing room."
"We didn't shoot anything different, so she might have rearranged scenes or taken a line out. ... I have no idea," he said. "I'm as anxious to see it as you are."
Foley's co-star, Joe Morton, who plays Rowan Pope, told ABC News last-minute switches are common on the series. In fact, it happened last week when Foley tried to give Franklin Russell, played by Brian White, a break during his interrogation by Quinn and Huck.
"When you got to this one scene where the two guys, for instance, do impressions of Rowan, well, that was not in anybody's script," he said. "I didn't even know that scene was shot. So a lot of that information is new. So whatever Shonda has done in the finale will be news to me when I see it."
One thing Morton does know, however, is that, unlike many fans, he doesn't want his character to get killed off.
"As far as I'm concerned, he does not deserve to die," he said. "In playing a villain, you can't play a villain from the negative. You can only play a villain from the positive. So my point of view is that any villain ... believes that whatever it is that they're doing is making either their world, or the world in general, a better place. So no, Rowan doesn't deserve to die."
So what can fans expect from the season finale? Foley gave a major hint.
"What the writers have done this finale is really amazing because they've taken -- and without getting into specifics, without ruining it for you -- they've taken a lot of the conventions that you expect to see on 'Scandal' and have gotten rid of them," he said. "They've taken people out of places that you usually see them and we don't know where they're going to end up. And it's going to really open the door for what I think is going to be a fantastic fifth season."
The season finale of "Scandal" airs tonight at 9 p.m. ET on ABC.