Homeland Season 4 Finale
Will the CIA succeed in their mission against ISI in 'Homeland' season 4 finale?Showtime/Homeland

Throughout "Homeland" season 4, the CIA officers are seen chasing Haissam Haqqani (Numan Acar) and in the finale of the political drama their focus will be on Dar Adal (F Murray Abraham).

The last episode of the Showtime series titled "Krieg Nicht Lieb", ended with a jaw dropping sequence, wherein the viewers as well as the officers - Carrie Mathison (Claire Danes), Aasar Khan (Raza Jaffrey) ) and Peter Quinn (Rupert Friend)- learn about CIA agent Adal's relationship with the Taliban terrorist.

The officers have just seen their colleague in the back seat of Haqqani's SUV and they are not sure whether he has made any move against the US or not. So, they will try to know more about Adal's role in terrorist operations in the 12th episode of the series titled "Long Time Coming".

In the meantime, the finale episode of "Homeland" season 4 is expected to have some breathtaking sequences as every CIA officer, including Mathison and Quinn, take their stand about the fight against ISI.

The sneak peek video of the finale episode shows Adal putting forward his own reasons for being a pro-terrorist CIA agent.

"Don't look so shocked. We have to see events for what they are. It's not what I have done is what I have got in return. None of our choice will make us blessed with moral clarity. Wanna adapt to its terrain. We are no men of no man's land," he says.

On the other hand, Saul Berenson (Mandy Patinkin) tells his wife Mira Berenson (Sarita Choudhury) that he wants to be back in CIA again.

However, it remains to be seen whether Quinn will plan out another move against the terrorist or once again he will call it quits. The show will be aired on Sunday, 21 December, at 9.00pm.

Watch the trailers of "Long Time Coming" below: