Quinn's (Rupert Friend) condition looks more disturbing in the sixth episode of "Homeland" season 6.

Based on the sneak peek released by Showtime, Quinn will be more paranoid than ever. It appears like he is having a hard time trusting anyone who goes near him, even if it is Carrie Mathison (Claire Danes).

In the promo clip for the episode called "The Return," Carrie is heard telling someone that she needs help getting through to Quinn. But the former black ops agent will not allow her to get near her. He also accuses Carrie of being "with them," since he saw an image of Carrie's stalker on her own phone.

The trailer also hints that Carrie's life is once again in danger. The former CIA agent can be heard telling someone that Quinn is right about his observation about the man who constantly watches her across the street.

The man might have a devious plan against Carrie, since he seems to have barged into her home in the upcoming episode. But Carrie appears to be aware of the intrusion, since the trailer shows that she is protecting herself against the man with a gun.

On the other hand, reports also claim that Saul (Mandy Patinkin) will do whatever it takes to find out the truth on the next episode of "Homeland" season 6. According to the synopsis for the upcoming episode, Carrie's former mentor will meet up with an old friend to help him investigate.

Meanwhile, President-elect Keane (Elizabeth Marvel) will reportedly make a stand on the next episode of "Homeland" season 6 after she found herself being taken in a safe house in the previous episode. But the synopsis has yet to reveal what Keane's decisions will be next episode.

Showtime will air the sixth episode of "Homeland" season 6 on Sunday, Feb. 26, at 9 p.m.