The Roku Channel
Plex
Tubi TV
E1
Episode 1
Where to watch
Seasons & Episodes
E2
Episode 2
E3
Episode 3
E4
Episode 4
E5
Episode 5
E6
Episode 6
E7
Episode 7
E8
Episode 8
E9
Episode 9
E10
Episode 10
E11
Episode 11
E12
Episode 12
E13
Episode 13
E14
Episode 14
E15
Episode 15
E16
Episode 16
E17
Episode 17
E18
Episode 18
E19
Episode 19
E20
Episode 20
E21
Episode 21
Cast
More from 陈楚寰 · Lead actress
More from Desmond Tan · Co-star actor
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Key Witness — streaming FAQ
Which OTT platform streams Key Witness?
Key Witness is streaming on The Roku Channel, Plex and Tubi TV in United States. It's not currently on Netflix.
Is Key Witness on Netflix?
No, Key Witness is not on Netflix in United States as of November 2026. It's currently on The Roku Channel and Plex.
Is Key Witness on Amazon Prime Video?
No, Key Witness isn't on Amazon Prime Video in United States right now. It's on The Roku Channel and Plex instead.
Where can I watch Key Witness for free?
Key Witness is available to stream free (with ads) on The Roku Channel and Plex in United States.
How many seasons are in Key Witness?
Key Witness has 1 season in total (21 episodes). The series concluded in 2022.
Are all episodes of Key Witness out yet?
Yes — all 21 episodes across 1 season of Key Witness are out and available to stream.
Is there a Season 2 of Key Witness?
No — Key Witness ended after 1 season, so there is no Season 2.
