Millie Gibson's role as Ruby Sunday in 'Doctor Who' will be significantly reduced in the upcoming series, with reports indicating she will only appear in two out of eight episodes. Showrunner Russell T Davies mentioned that her character's story is on pause but will return, while a new companion, Varada Sethu, will join the cast. Despite speculations about Gibson's future in the show, there is a possibility for her return as Ruby. The upcoming season will feature crucial stories for Ruby and her family, spanning two years of narrative. Fans can anticipate a mix of standalone episodes and the continuation of Ruby's storyline intertwined with the Doctor's adventures.