Tonight’s Sherlock season 3 episode will see the wedding of Watson and Mary, but will his best friend be able to pull off a best man speech?

Sherlock season 3, episode 2 titled “The Sign of Three” airs tonight on PBS at 10 p.m. eastern/pacific.

The episode already aired in the United Kingdom earlier in the month, so we already have a recap and list of best moments available for your viewing pleasure…

Fun fact: “The Sign of Three” is based on Arthur Conan Doyle’s Sherlock novel “The Sign of Four.”

The synopsis for the episode reads, “In episode two of this new series, Sherlock faces his biggest challenge of all – delivering a Best Man’s speech on John’s wedding day! But all isn’t quite as it seems. Mortal danger stalks the reception – and someone might not make it to the happy couple’s first dance. Sherlock must thank the bridesmaids, solve the case and stop a killer!”

Related: Hypable sorts the show’s characters into Hogwarts houses

Check out a clip from the episode below in which we get to see Sherlock giving his best man speech:

You can watch last week’s premiere online if you need to properly prepare yourself for episode 2.

Watch ‘Sherlock’ online

You’ll be able to watch tonight’s new episode beginning Monday when PBS releases it on their website for free streaming. We’ll be sure to share the episode when it hits the internet.

Are you nervous about the big wedding? And how the two detectives will feel about this new aspect of their friendship (one of them is married, one of them is not)?