More than Agastya pretending to be Surya, him suffering through a memory loss, seems more plausible as per the plot. The fact that, they've introduced one month leap, helps it too. What if the other car that almost hit Agastya imlie was Surya's(that explains August's shocked reaction as well) & he too possibly fell down the cliff. But Agastya survived & he didn't. Owing to severe head injuries, he had a memory loss & when he woke up he was at Surya's house. The fam members might hv shown him pics & he believed he's their Surya indeed. Also, 1 month mein, insaan seekh jaata hai bhasha.. But can't say much about the change in skin complexion tbh. Sun tan hogaya hoga shayad. He was leading a luxurious life as Agastya, kahan yeh dhoop mein police ki duty suit huyi hogi 
Edited by Gimmeitt - 1 years ago