‘Elementary’ Spoilers: EP Teases Marcus-Centric Season 5, Episode 21

This week’s Season 5, episode 21 of “Elementary” is going to be a huge one for Detective Marcus Bell (Jon Michael Hill).

Marcus’ girlfriend, Chantal (Chasten Harmon), remains unconscious in the episode after being assaulted by an unidentified man at the end of last week’s installment. “Of course, all eyes are on her ex-husband Roy (Robert Christopher Riley),” executive producer Rob Doherty told TVLine. “And Marcus is understandably upset and angry and wants to be part of the investigation.”

Doherty noted that “an emotional cop tends to make mistakes,” and Marcus isn’t any different. When Marcus’ rage took over him “while the police are conducting the official investigation,” the police detective teams up with Sherlock on “a separate and perhaps more compelling investigation into Roy.”

READ: Rob Doherty talks “Elementary” Season 5 finale, Season 6 renewal odds

Shockingly, before Chantal’s case can even be solved, Roy is killed in what Sherlock and Joan (Lucy Liu) discover as a staged suicide. According to the synopsis for the episode, Sherlock, Joan and Marcus then find themselves looking for one suspect behind the two cases. And in the process, the British sleuth discovers something about Marcus’ past that might have something to do with the crimes.

In a separate interview with TVLine, Doherty said that the episode offers “a much better sense of [Marcus’] upbringing and why [viewers] don’t hear much about [his] dad.”

At the end of the last episode, Joan found evidence that the man who made a complaint against Marcus was Roy’s neighbor. Shortly after the neighbor admitted that Roy was the one who asked him to make false allegations about Marcus, Roy was arrested, and that’s why Marcus’ primary suspect in Chantal’s assault is her ex-boyfriend.

“Elementary” Season 5, episode 21, titled “Fly Into a Rage, Make a Bad Landing,” airs on Sunday, April 30 at 10 p.m. EDT on CBS.