OH OK!!! good point.lizzie11991 said:the third derevko as in katya and irina's third sisterMVhunny said:wait, you mean the third derevko as in nadia???
I HAVE NO IDEA.
yeah in crossings jack said to Katya are you 'elena or yekatarina' (yeah those are probably spelled wrong)Alias_Addict47 said:i think by the 3rd Derevko sister she means the only one that hasn't been shown yet. Jack said when he first met Katya that he said, "oh, you most be Irina's second sister." Irina has 2 sisters, Katya and 1 unknown one. She was talking about the unknown one, not Nadia (Nadia's Syd's sister not Irina's b/c Nadia's Irina's daughter!) and not Katya a mysterious person who has not been seen on the show thus far.