‘Elementary’ Season 5 Spoilers: Watson Tells Sherlock Her Concerns About Kitty’s Return In Episode 15 Sneak Peek

Watson (Lucy Liu) thinks that Kitty’s (Ophelia Lovibond) return to New York is not a good idea.

In a sneak peek from Season 5, episode 15 of “Elementary,” Sherlock (Jonny Lee Miller) asks Watson and Kitty to talk to Captain Gregson (Aidan Quinn), but Watson is hesitant about it.

When Sherlock and Kitty asked what the problem is, Watson reminds them of the acid attack Kitty did to Del Gruner (Stuart Townsend) before she flew back to London.

“You didn’t just leave New York, you fled [after attacking Del],” Watson tells Kitty.

“Del Gruner wasn’t a guy. He was a monster,” Kitty says of her attacker. “All things considered, I’d say he didn’t go off easy.”

“All I was saying the captain knew it was you,” Watson warns her.

Sherlock corrects Watson, saying that Captain Gregson only suspected Kitty. He also points out that Gruner never said a word about who attacked him. “Obviously, he didn’t want to reveal his true connection to Kitty,” Sherlock says.

As to why Kitty doesn’t have any worries about meeting the captain, she tells Watson and Sherlock that she actually reached out to the captain after she left New York.

“I wrote him a letter, the captain, after I go back [to London],” she reveals. “I didn’t confess anything … I just apologized if I disappointed him. It’s square.”

Five years before becoming Sherlock’s protégé, Kitty was kidnapped, raped and tortured by a male perpetrator, who was later revealed to be Del. Kitty captured Del in Season 3, episode 12. Although Kitty didn’t kill him, she did leave him badly scarred after assaulting him with an acid attack. At the time, Captain Gregson made it clear that he would have to track down the culprit of the crime, even if it was a name he knew, leaving Kitty no choice but to flee New York.

While the sneak peek doesn’t reveal why Sherlock needs Watson and Kitty to talk to Captain Gregson, the synopsis for the episode suggests that it may have something to do with a serial killer who wants Sherlock and Kitty dead.

The episode summary reveals that Kitty flies back to New York to warn Sherlock that they are the next targets of a murderer who is eliminating everyone involved in a case they worked on together in London. As Kitty, Sherlock and Watson team up with the NYPD to catch the murderer, Watson discovers that Kitty comes back with a secret relating to a new man in her life.

“Elementary” Season 5, episode 15, titled “Wrong Side of the Road,” airs on Sunday, March 5 at 10 p.m. EST on CBS.