Sometimes, a single unexpected event can irreversibly alter one's life. What would happen, if one day you were to wake up and discover, that you don't know who you are, who you love or care about? Is fate cruel enough to take everything, including your identity and memories? How can you piece together your new life, when you're missing the building elements of who you are?
Diagnosis (Season 4)

Episode 1 (Episode 1)
Air date: 2019-02-26
Runtime: 42 min

Episode 2 (Episode 2)
Writer: Hanna Węsierska
Air date: 2019-03-05
Runtime: 42 min

Episode 3 (Episode 3)
Air date: 2019-03-12
Runtime: 42 min

Episode 4 (Episode 4)
Writer: Hanna Węsierska
Air date: 2019-03-19
Runtime: 42 min

Episode 5 (Episode 5)
Air date: 2019-03-26
Runtime: 42 min

Episode 6 (Episode 6)
Air date: 2019-04-02
Runtime: 42 min

Episode 7 (Episode 7)
Writer: Hanna Węsierska
Air date: 2019-04-09
Runtime: 42 min

Episode 8 (Episode 8)
Air date: 2019-04-16
Runtime: 42 min

Episode 9 (Episode 9)
Air date: 2019-04-23
Runtime: 42 min

Episode 10 (Episode 10)
Air date: 2019-04-30
Runtime: 42 min

Episode 11 (Episode 11)
Writer: Hanna Węsierska
Air date: 2019-05-07
Runtime: 42 min

Episode 12 (Episode 12)
Air date: 2019-05-14
Runtime: 42 min

Episode 13 (Episode 13)
Air date: 2019-05-21
Runtime: 42 min
