By Samantha Simon
Updated Nov 23, 2015 @ 6:00 am
Credit: Courtesy E!

No one does a boat day quite like The Royals. On last night’s episode of the E! drama, Princess Eleanor (Alexandra Park) and Prince Liam (William Moseley) headed off to spend a day on their friend Holden’s yacht. With bodyguards Jasper (Tom Austen) and Special Agent Hill in tow, the crew is ready for some fun in the sun—all but Liam.

After demonstrating his American accent—which Moseley hinted at when we spoke with him recently—while secretly following King Cyrus (Jake Maskall) with Jasper, Liam makes it clear that he’s determined to do whatever it takes to find out who killed his father. He believes that it was Cyrus, but he soon learns that Cyrus has an alibi that’s airtight—literally.

The new king has been claiming that he’s meeting with the prime minister lately, but he’s actually been sneaking off to receive treatment for testicular cancer. Liam bursts in during one of Cyrus’s sessions, which involves the king resting inside of a large glass tube.

Credit: Courtesy E!

In true Cyrus fashion, he doesn’t want anyone to know about his condition. He says that he would rather be a suspected murderer than a victim who needs the people’s sympathy. With one suspect crossed off his list, Liam continues on his “quest for vengeance,” as Eleanor calls it. She encourages him to try to just enjoy the day with his friends once they’re on the yacht, but Liam isn’t in the mood. While he sulks, Eleanor keeps herself busy by drinking and dancing with Beck (Andrew Cooper), her former-turned-current flame. Although everyone seems to like the all-around charming Beck, Jasper isn’t a fan. Not surprisingly, he wants Eleanor all to himself. But the princess is very clearly all about Beck these days—even though he doesn’t approve of her partying ways.

Credit: Courtesy E!

While the younger generation of royals are having fun in the sun, Queen Helena (Elizabeth Hurley) is busy getting ready for the State Opening of the Houses of Parliament. She may not have been aboard the boat, but Hurley’s presence was still felt at sea, according to the show’s costume designer, Rachel Walsh. “We used Elizabeth’s swimwear again this season on the show,” said Walsh, who also dressed the stars in Hurley’s designs when the characters vacationed in Monaco last season. This time, “They’re on a beautiful yacht with the London skyline in the background, and we used loads of Elizabeth’s swimwear and kimonos and caftans.”

Credit: Courtesy E!

Meanwhile, Hurley’s character was getting decked out for an event to celebrate the opening of the Houses of Parliament. And her look is one worth noting. “I think that this is the one time this season that Elizabeth probably looks totally different,” said Walsh. “She’s in a long ivory silk vintage dress for the big ceremony that is happening at Parliament. Officially, the Duchess of Cambridge would wear a white ivory dress with a sash, so Elizabeth and I talked about what would be appropriate.”

The verdict? “We decided she had to go with what tradition would dictate, but we hunted for a vintage dress and found this beautiful 1950s silk brocade floor-length gown in Greenwich Market,” said Walsh. “We altered and embellished it, and there are Swarovski [crystals] all around the neckline. She wears a beautiful vintage tiara and a little fur stole, which is also a vintage piece. It is quite an unusual and different look for her.” While wearing the gown, the queen stumbles upon an unusual situation, too. She finds the prime minister dead in the palace—and the S&M-loving man is wearing one of the queen’s thongs, at that. With the help of her assistant, she cuts the underwear off of him and stages a more normal scene. Because the queen is all about PR.

The episode ends with a glimpse at the new acting prime minister, who says she doesn’t have time for the queen. We have a feeling that there’s going to be some bad blood between those two, but it looks like one relationship may finally be on the mend. The last scene shows Liam knocking on a door and saying hi to someone—and from the look on his face, we’re guessing there’s a reunion with Ophelia (Merritt Patterson) on the horizon.

Tune into The Royals on Sundays at 10 p.m. ET on E!