By Zoe Delaney Millie Gibson has been spotted filming what could be her final Doctor Who scenes, with it looking like the Doctor’s companion gets into a sticky situation before departing. The Mirror revealed earlier this year that Milly, 19, is set to leave the next series of the BBC show, with her replacement already revealed. The former Coronation Street star, who plays orphan Ruby Sunday, will be replaced by actress Varada Seethu in Ncuti Gatwa’s second series. The decision to write out Millie was made last year by showrunner Russell T Davies after filming on her first run ended. This unexp…