During last night's Sherlock everyone Googled the same thing 3 years ago

During last night's Sherlock everyone Googled the same thing

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Season four of the popular series Sherlock started last night with Benedict Cumberbatch back as the lead role. While it made a welcomed return, it left a lot of people looking for the same thing - the meaning of "Ammo".

During the show it was used by Sherlock's captors as a code word as they whispered among themselves. "Ammo", was used for the codename of a British woman.

The first thing people did when they heard it was Google the term leading to a huge spike on Google trends.

Twitter user, Cormac O'Malley, spotted the trend.