Rose Ayling-Ellis is inspirational as she meets a retirement community ready to learn new skills. Plus: the finale of an excellent true crime drama. Here’s what to watch this evening

9pm, BBC One
It’s not an easy pitch for deaf actor and Strictly champion Rose Ayling-Ellis to teach sign language to a retirement community. But she finds a group of enthusiastic 65-95-year-olds, some of whom are experiencing hearing loss. Along with charismatic teacher Marios Costi, she determinedly starts a two-part experiment to highlight the increasing need for signing. This is moving, inspirational television – with added bingo and karaoke. As one of the students says: “We’re not old people; we’re recycled teenagers.” Hollie Richardson