Synopsis for 3×19: Sherlock ends up helping a hacktivist from the collective Everyone, and it turns into a murder investigation. Joan struggles to get back into the swing of being social and appears to be trending toward isolation as she comes up with excuses to avoid a bachelorette party.
Rating: ★★★★☆
While practicing heart rate manipulation, Sherlock was rudely interrupted by his latest client pounding on the door. Much to his surprise, the young man on his doorstep claimed to be a hacker from the infamous hacktivist group Everyone, which has been mentioned throughout the show’s existence. They’ve forced Sherlock to embarrass himself on multiple occasions, but at this point the man who goes by SuckingChestWound (later revealed to be named Petros) needs Sherlock’s help to keep a civil war from blowing up.
According to Petros, there’s another leader who opposes him on a lot of issues. While Petros wants to continue along the lines of disorganized anarchy, Species, the other user, wants to organize Everyone into a collective with set parameters. Species wants Everyone to be an organization that goes after specific targets for political reasons, not just for fun. Petros wanted Sherlock’s help to track down information on Species but was turned down.
The next day, Species turned up very dead, and Petros was certainly the prime suspect.

When they brought him in, he claimed he had an alibi for the night that Species was killed. He gave the name of an investment banker who had a tendency to hang around the Everyone message boards. According to Petros, the two had been sleeping together that night and she would alibi him. Of course she didn’t.
As all of this is going on, Joan got sucked into a bachelorette party that she clearly didn’t want to go to. Even after she went, she made up an excuse to leave early and returned to working on the case, piquing Sherlock’s curiosity.
![[CBS]](http://www.nerdophiles.com/wp-content/uploads/2015/05/106131-213b-470x312.jpg)
Put on the trail of Everyone’s “Inner Sanctum” they began to search for someone who could have profited off of his death. One of the members was tracked through a recent motorcycle purchase, and a bit of investigation revealed that the man behind the screen name, Caleb, had suddenly come into a great deal of money. It quickly came to light that, while he had stolen Species’ “stash” of information and sold it for a nice profit, he hadn’t killed the guy.
Sherlock finally confronted Joan about her strange, isolated behavior. He tried to come at the situation by claiming it didn’t “work for him” for her to be acting so much like him. However, she didn’t take it well and essentially told him to butt out. It was what she needed to do at that moment and she didn’t wish to be critiqued.
![[CBS]](http://www.nerdophiles.com/wp-content/uploads/2015/05/106131-82b-470x312.jpg)
Sherlock revisited Joan’s odd behavior and they had a talk about friendship. He let her know he’d been observing her taking on more of his own attributes and said, “I am not a better person because of a lack of connection.” He wanted to encourage her not to follow in his footsteps. Rather, they need to be one Holmes and one Watson. Anything else would lead Watson down an undesirable path.
With some brilliant detective work, Joan lured the other user behind the Species handle into revealing himself. Brady is the man they tracked down, only to be interrupted by an FBI agent who was determined to keep Brady out of their hands. She alibi’ed him for the night of Species death, leaving Sherlock and Joan to puzzle over the situation.
![[CBS]](http://www.nerdophiles.com/wp-content/uploads/2015/05/106131-95b-470x312.jpg)
They found that Agent Branch has hired an illegal nanny to take care of her child and used it to get her to give up the murder weapon. She would rather have kept her career intact than have it destroyed by bad publicity. Brady was arrested, and the case was solved.
Joan, having taken what Sherlock said to heart, agreed to be back on the bridal party for her friend’s wedding.