Michael Ginsberg confides to Peggy that he was born in a concentration camp – Episode Six, 'Far Away Places'
New staff copywriter Michael Ginsberg gave Don a run for his money as the most enigmatic character in the Mad Men universe for several episodes, until he dropped this bombshell during a late-night work spree. Up to this point, Michael was just a preternaturally talented ad man with zero social graces and a penchant for plaid jackets. But this glimpse into his past helps to explain why he seems so damaged – and why he's hostile toward his "father," Morris, who adopted Michael when he was five. His only family history is that his mother died at the hands of the Nazis.