Tommy Vegas 9-1-1: Lone Star season 5 storyline was pitched by a former cast member. A spinoff of 9-1-1, the Fox procedural was created by Ryan Murphy, Brad Falchuk, and Tim Minear, and focuses on the personal and professional lives of first responders in Austin, Texas. The show premiered to strong ratings across its first three seasons, before a ratings dip in season 4. 9-1-1: Lone Star season 5 was renewed, which would be the final season, and a departed cast member pitched a prominent Tommy storyline. In season 5, episode 6, it was revealed that Tommy (played by Gina Torres) tested positive for breast cancer.

https://screenrant.com/911-lone-star-tommy-cancer-storyline-sierra-mcclean-pitch/