"The Six Thatchers" — A mystery involving Mary Watson's past.
If you are searching for specifically for this season, you may be encountering a "Season 4 Episode 5" listing due to how different streaming platforms or unofficial subtitle repositories categorize the show: Sherlock subtitles Slovenian S04E05
: This one-off Victorian special is sometimes listed as "Episode 0" or "Episode 4" of Season 4, which can shift the numbering of subsequent episodes in some databases. "The Six Thatchers" — A mystery involving Mary
"The Final Problem" — The intense series finale introducing Sherlock's sister. Note on Subtitles and Language Sherlock subtitles Slovenian S04E05
"The Lying Detective" — Frequently cited by fans as the season's "masterpiece".
There is no episode 5 of Season 4, as the BBC series famously followed a format of three feature-length episodes per season.