Watch Sherlock Season 4 full episodes online, free and paid options via our partners and affiliates.

Long Buried Secrets - Sherlock
Watch Sherlock Season 4 Episode 3
"The Final Problem"
Original Air Date:

On Sherlock Season 4 Episode 3, long buried secrets finally catch up with the Holmes family, giving them their greatest challenge on the season finale.

Toby Jones is Introduced - Sherlock
Watch Sherlock Season 4 Episode 2
"The Lying Detective"
Original Air Date:

On Sherlock Season 4 Episode 2, Sherlock tries to catch a serial killer hiding in plain sight, while John Watson tries to deal with the death of his wife.

Not Thatchers - Sherlock
Watch Sherlock Season 4 Episode 1
"The Six Thatchers"
Original Air Date:

On Sherlock Season 4 Episode 1, Sherlock continues solving cases, waiting for Moriarty's posthumous move. However, a trivial detail in a baffling case catches Sherlock's interest.

Sherlock Season 4 Quotes

Taking your own life. Interesting expression, taking it from who? Once it's over, it's not you who'll miss it. Your own death is something that happens to everyone else. Your life is not your own, keep your hands off it.

Sherlock

John: You did not kill Mary. She made a choice to save your life. You didn't make her do it, nobody could make Mary do anything. You didn't kill her.
Sherlock: In saving my life she conferred a value on it. It is a currency I do not know how to spend.