Found it to be a surprisingly fun episode. Loved Sherlock's first reaction to the doll, and to Watson's accusations regarding her boyfriend. He just had a lot of funny lines throughout that had me cracking up more than usual. And I appreciated that the writers didn't actually have the computer killing a guy, and that Sherlock's doubts about it actually seemed plausible and grounded in the real world (which doesn't always happen on this show). Although it does seem a bit extreme (even for a paranoid conspiracy theorist) to go through all that trouble to kill a guy based on the very slight possibility that he might have created a real AI. You'd think they would want much stronger proof to go on first, since, as Sherlock says, most efforts so far amount to little more than "really clever programming."