Mr Ring-A-Ding is a character from the "Doctor Who" universe, introduced in Season 15, Episode 2 titled "Lux." He appears as a sprightly, anthropomorphic cartoon bug with sky blue skin, big eyes, and a brilliant smile, dressed in an early 20th-century style
. However, beneath this cheerful exterior, Mr Ring-A-Ding is actually Lux Imperator, the God of Light and a member of the Pantheon, a group of powerful god-like beings
. Mr Ring-A-Ding originated from a 1935 cartoon called Mr Ring-a-Ding Goes to Town , where he was an all-singing, all-dancing entertainer. The character becomes sinister when moonlight interferes with the cinema projection of his film, allowing him to come to life and trap people inside filmstrips, effectively imprisoning them in a two-dimensional cartoon world
. He can manipulate light like a film reel and capture living beings as images or animations
. In the episode, Mr Ring-A-Ding confronts the Doctor and his companion Belinda. He traps them in his 2D cartoon world, which they can only escape by "opening up emotionally" to add more dimensions to themselves. Mr Ring-A- Ding's ultimate goal is to absorb the Doctor's Time Lord regeneration energy to create a more substantial, three-dimensional body
. As he absorbs more light and energy, he grows larger and more powerful until he is finally defeated when the cinema film stock is set on fire, exposing him to sunlight, which destroys him
. The character is voiced by Alan Cumming, who describes Mr Ring-A-Ding as starting out fun and endearing but ultimately becoming a menacing and villainous figure
. The episode "Lux" also marks the directorial debut of Amanda Brotchie for "Doctor Who"
. In summary, Mr Ring-A-Ding is a complex villain who blends the charm of a vintage cartoon with the menace of a godlike entity obsessed with light, making him a unique and memorable foe for the Doctor
