I don't know if u can come with a worst ending then chuck. I sum it up. A few episodes earlier Sara is prego and she gets a corrpurt interect(which causes memory lose). then she is captured, the bad forces the intersect in her head to flash, which wipes out all her memory of her falling for chuck. It ends with chuck recapping the story and then they divide to uses chucks freind ideal of one kiss should get her memory back and it ends after u never find out if works