Thursday night's "Elementary" episode "Possibility Two" involves Watson's (Lucy Liu) deductive training for her new job as Sherlock's (Jonny Lee Miller) investigative assistant. Her first mystery is right up her alley, as it involves drugs and the medical profession.
Watson's first deductive test
Sherlock starts Watson off with a test. The pair are presented with two bodies, and Sherlock puts Watson on the spot in front of the detectives, asking her what she sees. She seems nervous and sounds a bit pathetic at first, stating the obvious. She eventually manages to mention one clue, which Sherlock picks up on.
Sherlock explains the solution to the mystery, which turns out to be much more involved than anyone could have imagined. But hey, Watson is only a deductionist in training at this point. She'll get there. Well, maybe not to Sherlock's level, but who knows? Maybe there could be a Watson spin-off someday.
Gerald Lydon offers a bee
Sherlock is soon solicited to work a new case by a man named Gerald Lydon (Dennis Boutsikaris) and his driver, Crabtree (Steven Hauck). Lydon claims that someone gave him a hereditary disease called CAA, resulting in his dementia. Sherlock refuses to take the case, stating that Lydon's paranoia is one of the symptoms. Lydon offers a rare solitary bee in a box in exchange for Sherlock's help. Sherlock visibly shows pain in his face as he refuses, once again.
Gregson (Aidan Quinn) calls Sherlock in on a murder investigation involving Lydon. Lydon will only speak with Sherlock. Lydon's driver has been murdered, and the detectives believe Lydon is the culprit. This time, Sherlock accepts the case, leaving the scene with his new solitary bee held close to his body like a security blanket.
Another body drops
Not long after taking the case, geneticist Natasha Kademan (Jennifer Lim) is murdered after giving Sherlock the names and addresses of people who would be capable of giving Lydon CAA. Sherlock allows Watson to take the reigns once again, but this time she excels. Working through her nerves, she notices that a splash of blood on Natasha's wall came from the perpetrator rather than the victim.
Natasha had sent Sherlock a clue in the form of a molecular structure right before he was to meet with her. Sherlock and Watson work on the structure through the night, but it is Watson this time who solves the problem. It basically proves that it is possible to give someone CAA.
Natasha Kademan's fiance, Paul (David Furr), turns out to be the one responsible for Natasha's murder. He had manufactured a fake blood sample in order to frame an innocent man by placing fake blood with the man's DNA on the painting. Paul had been working with Natasha on hereditary marker for those with a predisposition to sociopathic behavior called the Warrior Gene. When they learned that Paul had the gene, she began distancing herself from him, and he killed her in frustration. Unfortunately, the murder has nothing to do with Lydon's case.
Next up is Lincoln Dunwoody, a man Paul said he believed was sleeping with Natasha. But it's actually two separate names Natasha had been researching. They are both names of people with CAA who donated money to CAA research. Brian Watt (Tom Galantich) becomes the next suspect after Sherlock learns that his lab was the recipient of quite a bit of CAA research money. He is the founder of the genetics lab where Natasha worked, and he has also been diagnosed with CAA. He decided to kill people using CAA just so he could get more money to research the disease and find a cure more quickly!
Watson solves her first test case
Throughout the episode, Sherlock sends Watson to a ridiculous dry cleaning business where the owners seem to have no idea what they are doing -- nor do they seem to care about their customers. Watson deduces that it is a test on her second visit, when she spots seven security cameras on the walls. Sherlock treats her as though she is looney, but she doesn't give up. She eventually calls in Det. Bell (Jon Michael Hill) to take down the fake establishment, which was a front for money laundering. Sherlock is impressed, initially believing he would have to send her there three more times before she would catch on. His goal was for her to trust her instincts, even when everyone else (Sherlock included) thinks she's crazy.