Friends, either it is Dev doing great acting like an impostor, or it could be Raju faking Dev!
Quick update:
Dev is shown entering the door to the total surprise of his whole family. His arm is heavily bandaged and his forehead has a plaster. He hugs every one of his family in turn, and Karan even pretends great sorrow that he was imagined dead. Dev tells NT he will never again leave her in sorrow like that. Meanwhile Dev's expressions are ambiguous ... still giving doubt that he may be Dev as he shows lots of emotion, but also he looks around now and then as if to see how big the house is .... Kajjal is anxiously watching what he does. He manages to speak quite like Dev in decent language.
Dev tells the family that on the day he was driving someone on the road had the accident but when he went to help, a man held a gun to his head and took all his belongings, then hit him unconscious and drove him to a remote place and threw him out of the car. He says Paua found him and nursed him as he was frequently losing memory, then Paua called Kajjal after seeing the newspaper ad. NT asks Kajal to now remove the garland from the photo of Dev because he is alive!
Meanwhile NT also thanks Paua, who says he wants to go to the bathroom, but Dev is unable to show where the bathroom is. Also when NT calls his name "Dev" twice he doesn't readily answer, plus later he can't even find the way to his own room, until Kajal saves the situation by helping him. Ameesha sees all this and looks very suspicious of his behaviour. But Dev covers up by pretending he gets frequent dizziness.
When no one watches Dev starts behaving stupid again with Paua like Raju, which Kajal is very uncomfortable with.
In Dev's room Kaajjal shows Raju all Dev's things and when he sees so many clothes and watches he starts acting greedy, and Kajal says if even one thing goes missing he will be in trouble. Just then NT comes and gives Dev his wallet and the locket (that Kajal gave him at the temple) saying it was found in the car. Kajal is moved by seeing the locket and NT asks her to put it on Dev again. She pretends to tie it on Dev, but when NT goes out, Kajal stuffs the locket in Raju's hand angrily. She says at least start calling me Kajal in front of all the household instead of "Kajal ji", but don't try to take personal advantage!
Meanwhile Kajal's Dad comes to take her home so she has to leave Dev and Paua there to manage. At home she tells Hottie she is scared because Ameesha/Karan look very suspicious.
Ameesha and Karan are very upset that Dev has returned because Karan says his man was sure he personally killed Dev! Ameesha however says she is very suspicious about this guy that he may not be Dev. Karan is disbelieving of this theory yet.
At the Singh household meanwhile Dev and Paua are behaving mad jumping on the bed and having pillow fights when they hit the fire alarm. Ameesha/Veer come and ask Dev to shut the alarm but he does not know where the switch is. They are very suspicious and Dev looks totally caught!
Preview: The same as the promo ... Kajal is thinking of Dev as his voice says "Your love has brought me here Kajal" but in reality Raju comes there and says "Its me Raju or Dev, what difference!"
Friends, I personally think Dev is deliberately creating lots of suspicion in Ameesha's mind. Others may not agree, thinking he really is Raju, who is not doing a good Dev-acting job . You decide!
Why do I think Dev may be "trying hard to look like an impostor" and create lots of suspicion? Because then Ameesha may try to bribe him and and get him on her side, and maybe reveal her further plans to him ...that way he can figure out the whole fraud. This is just my hope and belief!