5 Best ‘Sherlock’ Episodes, Ranked by IMDb

There's a reason the BBC's Sherlock, starring Benedict Cumberbatch and Martin Freeman, has earned a loyal fanbase — all thanks to great dialogue, witty performances, plot twists, and respectful attitude towards Arthur Conan Doyle’s classic detective stories.

Over its four seasons, the show delivered several standout episodes, but some have emerged as true fan favorites. Here are the 5 best Sherlock episodes, ranked by their IMDb scores.

1. “The Reichenbach Fall” (2012)

• IMDb score 9.6/10

This emotionally charged finale to season 2 is often regarded as the series' most iconic episode. It pits Sherlock Holmes against his greatest adversary, Jim Moriarty, in a high-stakes battle of intellect and reputation. With stunning twists and a jaw-dropping cliffhanger, “The Reichenbach Fall” showcases the height of the show’s dramatic story.

2. “A Scandal in Belgravia” (2012)

• IMDb score 9.4/10

Season 2 opens with a bang as “A Scandal in Belgravia” introduces the enigmatic Irene Adler. The episode has it all: moments of pure wit, sensuality, and mystery. Sherlock navigates a case that challenges his famously cold logic, which is the most popular part of the episode. The chemistry between Cumberbatch and Lara Pulver is electric, making this episode a fan favorite.

“This episode is so satisfying, the end, the whole story is awesome. Super witty, the friendship/rivalry is great, and all together a great episode! My favorite episode. Thank you, somebody said it!” Redditor Far_Variety9368 said.

3. “His Last Vow” (2014)

• IMDb score 9.2/10

The season 3 finale dives deep into Sherlock’s psyche as he faces Charles Augustus Magnussen, a villain more terrifying for his manipulation than physical power. The episode is intense and layered, exploring themes of loyalty, morality, and… personal cost. It even won the 2014 Emmy for Outstanding Television Movie.

4. “The Lying Detective” (2017)

• IMDb score 9.1/10

This standout from season 4 brings another dark layer to the series just when you thought everything was already out there. As Sherlock spirals into drug use as he investigates a sinister millionaire played chillingly by Toby Jones. With haunting performances and strong character development, “The Lying Detective” proves the series still had surprises up its sleeve.

5. “The Great Game” (2010)

• IMDb score 9/10

“The Great Game” is the finale of season 1 and it showcases the early brilliance of the show. Sherlock is drawn into a series of timed puzzles by a mysterious foe, which turns out to be… Moriarty. The episode is fast-paced and filled with suspense, setting the stage for the even more dramatic arcs to come later.