In this week’s episode of “The Royals,” Queen Helena (Elizabeth Hurley) learns the devastating truth about what really happened to her lover, Alistair Lacey (Noah Huntley). Meanwhile, the mystery behind Jasper (Tom Austen) and Mandy (Sarah Dumont) is also revealed.

Lucius (Andrew Bicknell) returns from Capt. Lacey’s apartment and tells Helena that the Captain has gone missing. Lucius also tells her that he might have fled because he was angry at her. His anger supposedly stems from when Helena used his friend, Henry, as her fall guy, when she claimed that the Prince and Princess are illegitimate offspring of a former lover.

Helena senses that Lucius, her trusted bodyguard for many years, is being untruthful. She sends Ted Pryce (Oliver Milburne) on a mission to dig up more information about Capt. Lacey. Meanwhile, Lucius warns King Cyrus (Jake Maskall) that Helena is already asking about her former lover. Cyrus then hints about their conspiracy to assassinate the poor Captain.

Cyrus meanwhile, is still busy trying to step out of the late King Simon’s shadow. He has already destroyed the monument that was built in honor of Simon, and now he’s trying to build his own legacy. He starts to realize that he will never be loved by the people just like his older brother. Instead, he employs a different tactic and tries to make his mark by instilling fear upon the people.

During the investiture ceremony for a national artist, Cyrus invites a cartoonist from a local paper, who dared to draw a caricature of him. He gets the cartoonist arrested in front of numerous honored guests and media, just to prove a point. On a lighter note, he’s grown fond of his maid, Violet. He promotes her to "Lady of the Privy Chamber" and showers her with lavish gifts.

During the same event, Princess Eleanor (Alexandra Park) decides to go completely public with her new girlfriend, Mandy. The lesbian relationship has been blowing up the tabloids and Queen Helena has been furious. In order to spite her mother, Eleanor flaunts her lesbian relationship even more.

Unbeknownst to Princess Eleanor, it’s not just Helena who is bothered by her new relationship. Jasper, her former bodyguard, is completely stressed out by Mandy’s presence in the palace. It turns out that she and Jasper used to be together. They had a plan to infiltrate the palace so that they could steal the Koh-i-Noor, one of the most famous crown jewels. Jasper tells Samantha to back off but she refuses to do it. Instead, she tells Jasper that she intends to go through with the theft and he has no choice but to leave with her once the diamond has been stolen.

Elsewhere, Prince Liam (William Moseley) is starting to develop a stronger relationship with Wilhelmina (Genevieve Gaunt), the female polo player who turns out to be a minor Royal. The two of them bond during the investiture and they start to get to know each other better.

Ted finally returns from his investigation and tells Helena about the evidence of some gunshots fired in Capt. Lacey’s apartment. They both start to suspect the worst but Helena still decides to confront Lucius. She catches him in a lie, and he is forced to admit that he killed her lover. She is devastated at both the betrayal and the realization that her lover is dead. She banishes him and tells Ted to make sure that he never returns.

Lucius tells Ted and Helena that he only did what he did to protect the Queen and the monarchy. Now that she has banished him, he no longer has anything to live for. He hints at suicide but Ted tells him to make his exit in a different manner. Lucius confesses to killing King Simon, hoping that this will give the Royal Family some closure. The Queen learns about the confession but she knows that he’s lying. Nevertheless, she tries to put her children at ease. She tells them that Lucius is the killer but Liam is also clearly skeptical.

Find out if the people of Great Britain will accept the confession more openly than the Royal Family, when “The Royals” returns next Sunday at 10 p.m. ET on E!.