He is a reformed criminal who used to rob banks, among other things, as well as an expert at picking locks and cracking safes. His nickname is Nosey.
Parker is the last of a long line of loyal retainers who served the English aristocracy. He was expected to follow in his forefather's footsteps, however he couldn't find work and fell into league with a series of London crooks. He learnt the tricks of the trade from them, and slowly made his way up the chain and earned his nickname 'Nosey'. However, he was eventually captured and landed in prison with Fred, a reformed bank robber. Fred eventually escaped from prison to rob the Bank of England.
Following his release, Parker decided to throw in his status and to find 'proper' work. However, he was still out of luck and went back to his former ways. Whilst robbing a safe belonging to an oil tycoon, Parker was caught by Lady Penelope Creighton-Ward, a young aristocrat who did a bit of part-time spying. Lady Penelope had heard of Parker's status in the underworld, and promised not to turn him in if he took up a working partnership with her. Parker realised that this was just what he needed, and happily agreed.
His duties included assisting her on odd jobs, being a faithful butler, and becoming the chauffeur of her pink Rolls-Royce FAB 1. When International Rescue hired Lady Penelope as their London Agent, Parker was dragged in, too.
Parker is a valuable addition to both Lady Penelope's secret activities and International Rescue missions.
TV episodes: Trapped in the Sky, The Perils Of Penelope, Day Of Disaster, 30 Minutes After Noon, Vault Of Death, The Mighty Atom, The Impostors, The Man From MI.5, Danger At Ocean Deep, The Duchess Assignment, Brink Of Disaster, The Cham-Cham, Atlantic Inferno, Path of Destruction, Alias Mr. Hackenbacker, Lord Parker's 'Oliday (16 episodes).
- Main article: Aloysius Parker/Missions
- Main article: Aloysius Parker/Outfits
- The Parker puppet was sculpted by John Blundall, who also made Grandma Tracy and Kyrano.
- Parker's facial features are based on those of comedian Ben Warriss.
- His voice is based on that of a waiter named Arthur (surname unknown) at a pub called "The King's Arms" in Cookham, who used to work for "'Er Majesty".
- His first name 'Aloysius' seems to be a late invention. Its exact source is presently unknown. It was never used in the TV series, nor in the two classic movies.
- Like Lady Penelope, the Parker character was first introduced to the world in issue 1 of TV Century 21 magazine, on 23 January 1965, in a comic-book story now known by the title "Mr Steelman". This was eight months before his UK television début.
- Scott, along with Lady Penelope, FAB 1, Parker and Brains appeared in British comedian Peter Kay's "Animated All Star Band" for BBC Children In Need 2009