E1Lethal Dosage
Where to watch
Not available in Switzerland
Streaming in 1 other country
Diagnosis: Unknown isn't on any streaming service in Switzerland right now, but it's available in United States. Streaming rights are licensed per country.
Seasons & Episodes
E1
E2Dangerous Contact
E3Death Shift
E4Deadly Medicine
E5Taste of Poison
E6Seeds of Destruction
E7Toxic Takeover
E8Silent Death
E9Cruel Deception
E10Silent Poison
Cast · Directed by Bertrand Morin
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Diagnosis: Unknown — streaming FAQ
Which OTT platform streams Diagnosis: Unknown?
Diagnosis: Unknown isn't on any streaming service in Switzerland yet, but it's available in United States. Streaming rights differ by country — switch your country in the header to see where.
Is Diagnosis: Unknown on Netflix?
No, Diagnosis: Unknown is not on Netflix in Switzerland as of August 2026.
Is Diagnosis: Unknown on Amazon Prime Video?
No, Diagnosis: Unknown isn't on Amazon Prime Video in Switzerland right now.
Where can I watch Diagnosis: Unknown for free?
Diagnosis: Unknown isn't streaming in Switzerland yet, so there's no way to watch it free at the moment.
How many seasons are in Diagnosis: Unknown?
Diagnosis: Unknown has 2 seasons in total (23 episodes). The series concluded in 2004.
Are all episodes of Diagnosis: Unknown out yet?
Yes — all 23 episodes across 2 seasons of Diagnosis: Unknown are out and available to stream.
Is there a Season 3 of Diagnosis: Unknown?
No — Diagnosis: Unknown ended after 2 seasons, so there is no Season 3.