Season 10 of "Keeping Up With the Kardashians" returns to E! on Sunday, and the first four episodes will feature the sisters' Armenia trip, reports E!

Khloé Kardashian and Kim Kardashian West are joined by Kim's husband, Kanye West, and their daughter, North, on a trip to Armenia. The sisters are descendants of Armenian immigrants on their father's side of the family. They have always wanted to visit their ancestral homeland. Fans will get to see their emotional visit to Armenia where they learned about their family roots.

In the video clip below, Khloé and Kim are welcomed by the Armenian people.

Caitlyn Jenner is expected to debut on later episodes.

Kim's second pregnancy will be featured, as well as the changes it will bring to her family's life.

In the first half of "KUWTK" Season 10, Khloé and younger sister, Kylie Jenner, discussed birth control pills. Their mother, Kris Jenner, walked in and inquired what they were talking about. Khloé explained that they were switching up Kylie's birth control.

The scene piqued the interest of many fans who suspected then 17-year-old Kylie was indeed sexually active with boyfriend and rapper Tyga, though both vehemently denied being more than friends.

If Kris has her way, now that Kylie is 18, her relationship with Tyga will be officially announced on a Season 10 episode of "KUWTK."

While E! network nor the Kardashian-Jenner clan has commented on whether that will happen, Radar Online reports that Tyga wants to make the couple's big reveal on his show "Kingin' with Tyga" to boost its ratings.

"But Kris has other ideas in mind. She wants to confirm their relationship by making it an entire episode of 'Keeping up with the Kardashians,'" a source close to the family told Radar Online.

Kris reportedly wants an episode that focuses on Kylie, especially since she has become so popular with fans of the show.

"The producers want to spin the episode into a 'friends become lovers' sort of thing even though they know that people already believe that Kylie and Tyga were together all along," the source said.

Fan will have to stay tuned to find out.

Watch "Keeping Up with the Kardashians" Season 10, Episode 14 on Sunday, Sept. 20, at 8 p.m. on E!