Where to watch
ITVX Premium
Cast · Directed by Roy Boulting
LR
Liam Redmond
Cmdr. Robert Brennan
AM
André Morell
Supt. Folland
KG
Kenneth Griffith
Jimmy Ellis
AB
Anthony Bushell
Maj. Elliott
MM
Mary Morris
Anna Braun
JH
Joan Hickson
Mrs. Ellis
AN
Anthony Nicholls
Grant Mansfield
GK
Geoffrey Keen
Morgan Williams
JB
John Bailey
Stringer
PD
Patric Doonan
George Ellis
DB
Dora Bryan
Mrs. Bowers
SL
Stuart Lindsell
Commissioner
More from Liam Redmond · Lead actor
More from André Morell · Co-star actor
More from Roy Boulting · Director
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High Treason — streaming FAQ
Which OTT platform streams High Treason?
High Treason is streaming on ITVX Premium and ITVX in United Kingdom. It's not currently on Netflix.
Is High Treason on Netflix?
No, High Treason is not on Netflix in United Kingdom as of October 2026. It's currently on ITVX Premium and ITVX.
Is High Treason on Amazon Prime Video?
No, High Treason isn't on Amazon Prime Video in United Kingdom right now. It's on ITVX Premium and ITVX instead.
Where can I watch High Treason for free?
High Treason is available to stream free (with ads) on ITVX in United Kingdom.
