This Is Us 4x1 Strangers Season 4 Season 0 0 EpisodesSeason 1 18 EpisodesSeason 2 18 EpisodesSeason 3 18 EpisodesSeason 4 18 EpisodesSeason 5 15 Episodes YouTubeEnglish - HD 4x1 - Strangers 4x2 - The Pool: Part Two 4x3 - Unhinged 4x4 - Flip a Coin 4x5 - Storybook Love 4x6 - The Club 4x7 - The Dinner and the Date 4x8 - Sorry 4x9 - So Long, Marianne 4x10 - Light and Shadows 4x11 - A Hell of a Week (1) 4x12 - A Hell of a Week (2) 4x13 - A Hell of a Week (3) 4x14 - The Cabin 4x15 - Clouds 4x16 - New York, New York, New York 4x17 - After the Fire 4x18 - Strangers: Part Two Jack meets Rebecca's parents. New characters are introduced.