Fans of "This is Us" can expect the upcoming episode to bridge the gap between the Thanksgiving episode that aired last week and the Christmas episode that will air early next month.

Episode 8 revealed a long-coming truth when Randall stumbled upon a letter from his mother Rebecca to William, which included a photo of him when he was young. He realized that his mother, who had always told him she did not know his biological father, had lied to him all this time.

The episode saw Randall confront Rebecca in front of William and the entire family as they were celebrating Thanksgiving. Apparently, Randall was very upset because of his mother's betrayal.

In episode 9 titled "The Trip," his feelings of betrayal will get even more intense. This was revealed by NBC show creator Dan Fogelman.

"And as we get into next week, the anger level will really be ratcheted up. Sterling played it so beautifully--more than anger he's stunned, and you feel his entire world spinning on its axis. I think anger comes with processing," he said.

He also revealed that while Rebecca is his main target, she will not be the only outlet for his anger.

"It's fair to say that the carnal, original sin he views as being Rebecca's. Everybody else is complicit, and it's not that he's letting everybody off the hook, but where he's focusing is on his mother," said Fogelman.

The synopsis for episode 9 reads, "Kate, Kevin and Randall head to their family's cabin to get away after their chaotic family Thanksgiving. A very angry Randall finds comfort and explanation from his father, Jack. Olivia speaks a harsh truth to Kate, which drives a wedge between Kate and Kevin. Rebecca and Jack struggle with what to do when 9-year-old Randall tells them that he's been looking for his birth parents."

"The Trip" airs on November 29 on NBC.