Brett was severely ill during The Case-Book (he had heart problems and later bipolar disorder). His performance remains brilliant, but his physical frailty is visible.
Available on BritBox, Amazon Prime (sometimes), YouTube (purchased), and DVD/Blu-ray box sets.
The series is split into The Adventures of Sherlock Holmes , The Return of Sherlock Holmes , The Case-Book of Sherlock Holmes , and several feature-length specials. Broadcast as 13 half-hour episodes in the US, but 60-minute episodes in the UK.