The Yellowstone prequel series 1883 has introduced crossover characters to the franchise, and this trend is likely to continue as the parent series returns for its final season. The Yellowstone universe is expanding with other spinoffs in the works, including 6666 and a third prequel titled 1944. The article explores the characters that have crossed over between different Yellowstone series, including James and Margaret Dutton, Elsa Dutton, John Dutton Sr., and Spencer Dutton. The upcoming spinoffs, 6666 and 1944, may also feature crossover characters.