BBC America released a new trailer for “Doctor Who” season 10 this week, teasing more of the first interactions between the Doctor and his new companion.

It will be a bittersweet season for fans of “Doctor Who,” we will be getting a new companion, but losing another great Doctor. Season 10 will be the final stretch for Peter Capaldi, who has been the Doctor since he took over for Matt Smith in 2013.

On leaving the show Capaldi said, “One of the greatest privileges of being Doctor Who is to see the world at its best. From our brilliant crew and creative team working for the best broadcaster on the planet, to the viewers and fans whose endless creativity, generosity and inclusiveness points to a brighter future ahead. I can’t thank everyone enough. It’s been cosmic.”

Capaldi is the Twelfth Doctor in the long-running series, BBC America has not announced who will be taking over the iconic role. Head writer and executive producer Steven Moffat told fans, “For years before I ever imagined being involved in Doctor Who, or had ever met the man, I wanted to work with Peter Capaldi. I could not have imagined that one day we’d be standing on the TARDIS together. Like Peter, I’m facing up to leaving the best job I’ll ever have, but knowing I do so in the company of the best, and kindest and cleverest of men, makes the saddest of endings a little sweeter. But hey, it’s a long way from over. Peters’ amazing, fiery, turbulent Doctor is still fighting the good fight, and his greatest adventures are yet to come. Monsters of the universe, be on your guard – Capaldi’s not done with you yet!”

The new companion in the video is actor Pearl Mackie, taking on the role of Bill in the series. Returning this season is Matt Lucas, he will once again be playing the role of Nardole.

The tenth season is expected to run for a total of 12 episodes, starting this April. The season will then be followed by the Christmas Special when the regeneration will take place.

Following the season 10 premiere, the new eight-part series “Class” will premiere. The show follows four Coal Hill School students who have hidden secrets and desires. The series stars Greg Austin as Charlie; Fady Elsayed as Ram; Sophie Hopkins as April; Vivian Oparah as Tanya and Katherine Kelly as Miss Quill.