Tajna historia XX wieku (2014)
Season 1
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2014 • 12 Episodes
Season 1 of Tajna historia XX wieku premiered on January 2, 2014
Season 2
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2016 • 12 Episodes
Season 2 of Tajna historia XX wieku premiered on January 2, 2016
Season 3
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2017 • 20 Episodes
Season 3 of Tajna historia XX wieku premiered on January 2, 2017
Season 4
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2018 • 12 Episodes
Season 4 of Tajna historia XX wieku premiered on January 2, 2018
Season 5
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2019 • 14 Episodes
Season 5 of Tajna historia XX wieku premiered on January 2, 2019
Season 6
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2020 • 12 Episodes
Season 6 of Tajna historia XX wieku premiered on January 2, 2020