"Russian Doll" is a Netflix series that follows Nadia, a woman who repeatedly dies and relives her 36th birthday party. The show explores themes of existentialism, trauma, and self-discovery as Nadia navigates her surreal predicament alongside Alan, another character caught in a similar time loop. Through dark humor and philosophical reflections, the series delves into the nature of life, death, and the importance of personal growth and connections. Ultimately, it highlights the journey toward understanding oneself and breaking free from destructive patterns.

Amy Poehler does not have a role in "Russian Doll." The series, which premiered on Netflix in 2019, stars Natasha Lyonne as the main character, Nadia Vulvokov, who finds herself in a time loop, repeatedly dying and reliving the same night in New York City. Poehler is one of the co-creators and executive producers of the show, alongside Lyonne and Leslye Headland, but she does not appear as an actress in the series.

Yes, "Russian Doll" is a Netflix original series. It premiered on the platform on February 1, 2019. Created by Natasha Lyonne, Leslye Headland, and Amy Poehler, the show follows Nadia, a woman who repeatedly experiences her own death and relives the same night in a loop. The series received critical acclaim for its writing, direction, and performances, particularly that of Lyonne. A second season was released on April 20, 2022, continuing Nadia's journey through time and self-discovery.

In "Russian Doll," the cat named Oatmeal is portrayed as a real cat within the story. Oatmeal plays a significant role in the protagonist Nadia's life, symbolizing comfort and companionship. The cat's interactions and presence are integral to the narrative, highlighting themes of connection and the cycle of life. While Oatmeal is a fictional character in the context of the show, the cat used in the series is a trained animal actor.