Tonight's (November 15) episode features the final scenes for the on-off Walford couple, who have hit crisis point over the past few days despite their recent wedding.
Fans know that Christian and Syed get one last chance to save their marriage in their final episode, but whether they leave together or go their separate ways remains to be seen.
Speaking on Loose Women this afternoon, Partridge confirmed that Christian and Syed won't be leaving in a black cab.
Pictured: John Partridge on Loose Women
He commented: "We do not go in a cab, but I'm not saying we go off together either! Whatever the ending is, it is the right ending. It may not necessarily be the ending that people want to see, but I think it's the right ending."
Marc Elliott, who played Syed, decided to leave EastEnders in February. Show chiefs and Partridge later reached the mutual decision that Christian should depart screens at the same time as Syed.
Partridge said today: "You know, some characters can survive when their partner goes, but we are known as 'Christian and Syed'. That's what we're known as. Yeah, I could have stayed around in the Square saying, 'Roxy, gin and tonic' every two weeks!
"I said I'd stay in the show as long as I was learning and still felt that I was moving forward, but in order to do that - in order to learn and move forward - you need to be given the material to do that. If I'm honest, I didn't feel - or we didn't feel - that we'd been given that material for a whole host of reasons. So that was part of the decision."
Paying tribute to Elliott, he continued: "When you work so closely with somebody for all that time, you can't help but form a really, really close friendship. I can't help but love him to bits. He drives me up the wall at the same time, but we're brothers."
Partridge will be playing Prince Charming in a production of Cinderella at the Theatre Royal in Nottingham over Christmas, and is also currently in talks for another project.
He explained: "I am in negotiations for something right now. It is something that on one hand is quite an obvious choice for me, but within that it isn't an obvious choice for me, so I'm quite excited about that!"
EastEnders airs tonight at 7.30pm on BBC One.