Vera and Nicole ponder who the Stasi mole in the Democratic Forum could be. Falk orders his agent Frank Luchnik, the Democratic Forum’s representative to the Round Table talks, to stall for time. In the meantime, he starts making copies of all the important Stasi files and passes the information to Schnyder. Marlene tracks down Schmolke, the doctor who swapped Julia and Martin’s baby on Stasi orders, and learns the identity of the midwife who was on duty that night – Johanna Wagner. Together with Hans, they go to see her in Pankow, to press her for a sworn statement that the babies were indeed swapped at birth – evidence that Martin can use to force the Simkows to have a paternity test for Anna. Falk gives Frank Luchnik a forged document stating that Robert Wolff had been a Stasi informant, which Luchnik presents to Vera and Nicole. They don’t buy it, and are now convinced that Luchnik himself is the mole. At a meeting of the Democratic Forum, the evidence against Wolff is presented, and Vera makes a startling confession about her own time as a Stasi informant. Her honesty turns sentiments against Luchnik, and the Forum nominates her as the new representative to the Round Table talks. Martin comes home that night, and Marlene and Hans present him with Johanna Wagner’s phone number – she’s willing to talk to him. Martin gets a sworn statement from Johanna about the baby swap, but his lawyer tells him that even with this proof, forcing a paternity test will involve a long legal battle against the Simkows. Martin is advised to speak with them again. Nicole and Vera get a confession from Luchnik, who says he was operating under duress. Vera asks him point blank if Falk is his Stasi controller. Marlene’s health problems continue, and she wants the entire family to spend Christmas together because she’s afraid that she doesn’t have much longer. She gets her wish – on Christmas Eve, the entire family gathers around the table one more time. When they are all together, Falk reveals that he has bought the house in which the family lives from the Ministry, so that his parents no longer need to worry about being evicted. Hans is touched and, for the first time in years, embraces his son. Johanna Wagner calls Martin again and meets with him to tell him that she recognizes Falk’s picture in the newspaper as the man who ordered that his daughter be swapped all those years ago.