Mr Ring-a-Ding is a character from the "Doctor Who" universe, introduced in Season 2, Episode 2 titled "Lux." He appears as an anthropomorphic, sky-blue cartoon bug with big eyes and a brilliant smile, dressed in early 20th-century attire
. Despite his cheerful and entertaining exterior—singing, dancing, and tap- dancing—he is actually a malevolent entity known as Lux Imperator, the God of Light and a member of the Pantheon
. Mr Ring-a-Ding exists as a two-dimensional cartoon who can manipulate light like a film reel. He has the power to trap living beings within light, imprisoning them as images or animations in his domain
. He was originally the star of a 1935 cartoon called "Mr Ring-a-Ding Goes to Town," but after an unusual encounter with moonlight, he rose out of the screen and caused several cinema-goers to disappear by trapping them in filmstrips
. In the episode, Mr Ring-a-Ding confronts the Doctor and Belinda, revealing his true identity and sinister intentions. He aims to absorb the Doctor’s Time Lord regeneration energy to build a more substantial body. As he absorbs more light, he grows from 2D to 3D, becoming increasingly powerful
. Ultimately, the Doctor and his allies defeat him by exposing him to sunlight, which destroys him
. The character is voiced by Alan Cumming and has become notable for his catchy song and sinister catchphrase, "Don't make me laugh!"
. The episode and character have attracted attention beyond the usual fanbase, with the "Mr Ring-a-Ding" song gaining popularity even among those not typically watching "Doctor Who"
. In summary, Mr Ring-a-Ding is a complex villain in "Doctor Who," combining nostalgic cartoon charm with a dark supernatural threat as the God of Light Lux Imperator
