The trailer for the upcoming Call the Midwife episode is finally available.

'Call The Midwife' Actress Reveals Something She 'Can't Believe'

Released on Monday, the promo shows love and smiles, but also troubling times. Sister Monica Joan might have something really serious happening as she wanders alone for the holidays.

Sister Julienne is also about to call the cops as things might get out of hand in some way.

Is Someone From 'Orange Is The New Black' Going To Appear On 'Call The Midwife?'

It's not all frightening, though--some people experience the magic of the holiday season. Kids clap on a bus and Santa Claus rings good cheer for the public. There are also more babies being born with parents that look thrilled.

See the promo below.

The Call the Midwife Christmas special airs on December 25 at 7:30 p.m. ET on BBC1. The fifth season is expected to officially begin in the United States on Sunday, April 3 on PBS.

Fans might also be happy to know that the series has been renewed for a sixth season as well. In a report from Carter Matt, executive producer Pippa Harris released a statement on how successful the show has been.

"I am delighted that the BBC has decided to commission series six of Call the Midwife even before we have gone on air with series five!" the statement reads. "It really demonstrates their commitment to and passion for the show. The ongoing success of Call the Midwife is down to the incredible writing skills of Heidi Thomas and the talent and dedication of our wonderful cast and crew."

Tags: Call The Midwife television PBS BBC One