Give a stream of consciousness and then the final answer. It additionally places emphasis on their brother Rob Kardashian, their mother Kris Jenner, their step-parent Bruce Jenner (now known as Caitlyn Jenner), their half-sisters Kendall and Kylie Jenner, and Kourtney's now ex-boyfriend, Scott Disick. Khloe's ex-husband Lamar Odom developed a major position as part of the supporting cast in the fourth season, though he was not a regular cast member in following seasons, and rarely appeared in season eight while attempting to fix his marriage with Khloe. Along in season seven Kanye West became a recurring cast members after dating Kim then marrying her in season nine. In seasons eight and nine, Caitlyn's children Brody and Brandon, and Brandon's wife, Leah became recurring cast members.

Answer this question: when does kanye come on keeping up with the kardashians?
This is the relevant information: Along in season seven Kanye West became a recurring cast members after dating Kim then marrying her in season nine.
So, the final answer is season seven.