The Time Lord and his new companion will be emerged in a adorably charming human settlement on the next episode of "Doctor Who" season 10.

In the trailer of the episode titled "Smile," Doctor Who (Peter Capaldi) and Bill Potts (Pearl Mackie) appear to have arrived in paradise as the TARDIS brought them in a new human settlement somewhere in the galaxy. But as they stay longer, the pair realize that the seemingly perfect and charming location could also be filled with a lot of deadly secrets.

According to the synopsis of the upcoming episode, the Time Lord and Bill are transported to a sparkling new city that reportedly holds the secret of human happiness. However, they will realize that the only ones present in the new human settlement are the tiny robots with emoticon faces called the Emojibots.

At first, Bill finds the Emojibots cute, but the time-travelling duo will soon stumble upon a pile of grinning skulls. According to reports, those who are living in the human settlement must always keep their smile on their faces if they want to stay alive. But can anyone continue to have their smile on if they know about the threat?

The upcoming episode is slated to air on BBC America on Saturday, April 22, at 9 p.m. EDT.

Meanwhile, Capaldi revealed that he already filmed his death scene as the Twelfth Doctor in an interview with BBC's "The Graham Norton Show" even if he still has to shoot his final Christmas episode in the series.

According to a report from Entertainment Weekly, the actor's statement was not a surprise since the trailer of the new season shows the iconic golden glow of "regeneration" that normally signifies the end of the current doctor and the beginning of a new one.

The actor also explained why he decided to end his reign as the Twelfth Doctor in season 10.

"Doctor Who is a great job, but it is a bit of a television factory. You do 12 episodes a year, and I just worried that I wouldn't be able to continue to do my best work," Capaldi stated. "I like to be able to learn the lines and do some preparation and come in and give it the vigor and the fun and not hate it. I just figure, while you're enjoying it, leave."