It seems that Mandy Moore provided the latest "This Is Us" finale spoilers to the fans. Her teasers could hint the answer to the most important question of the show - who is Jack's Killer? Apparently, Jack's death will be the main focus of the show's season one finale.

Who Is Jack's Killer?

Die-hard fans are eager to know the reason of Jack's death. "This is Us" Season 1 finale spoilers indicate this episode will feature a time period in the 1970's when Jack does not know Chad yet. The title of this episode will be "Heartbreaking", which apparently suggests the mood of the episode.

Finale Episode Might Break The Hearts Of Fans

This is what Mandy Moore hinted the fans. She said that a heartbreaking scene is exactly what fans could expect. Moore stated that this finale episode will be "as heartbreaking as life in this world is". She added that the manner of Jack's passing will break the hearts of people.

Wrong Theory

There were speculations regarding the person responsible for Jack's death. Theories were made in relation to Miguel and Rebecca's desire to be together at the current time. This is may be the reason why they planned to get Jack out of their way, and eventually killed him.

However, Moore said that there is no way this could happen. She added that people are just going bananas about it. To her, this theory is just unbelievable.

New Story Arcs Might Be Introduced

Jack is one of the main characters in season one. Therefore, Moore described his death as a "monumental event for the family". A number of "This Is Us" Season 1 finale spoilers also indicate that it will be a cliffhanger. Moreover, there will be several story arcs that will be introduced as a lead for the next two seasons of the show.