Surgical Registrar. Played by: Tamsin Greig
The newest doctor at East Hampton, Caroline has a unique talent of getting herself into embarrassing or awkward situations. Past incidents include blocking Guy's toilet with a "monster that wouldn't go down", getting a pen top stuck up her nose, and her left hand going magnetic whenever there is a full moon.
Surgeon. Played by: Julian Rhind-Tutt
Probably the most popular member of staff - Mac is clever, witty, handsome and, as Sue White says, "has hair like a lion's mane". Partial to riding naked on motorbikes, Mac never knows when to be serious and finds it difficult to express his emotions. However, he is always useful to have in a crisis (unless it's a wasp in theatre), especially when you're hanging off of the edge of a cliff in an ambulance.
aka: Dr. Guilaume Valerie Secretan Anaesthetist. Played by: Stephen Mangan
Guy likes to profess that he has it all: the looks, the money, the intelligence, and the way with the ladies. This is despite the fact he has been compared to "the donkey in Shrek", thought 'Kissing In The Toilet' was a George Michael song, and has not had very much luck seducing Dr Todd.
aka: Dr. Alan Roderick Statham Consultant in Imaging and Radiology. Played by: Mark Heap
The fussy, bumbling and stuttering consultant radiologist likes to believe he is in control of the hospital when in reality he is just the butt of everyone's jokes. Alan gets upset very easily, and has the worst comeback lines ever. He has a bunch of weird fetishes, including playing his recorder whilst in his boxers, and gets caught in the most bizarre situations (for example when he was comparing the size of his penis to a corpse's).
aka: Joanna Yardley Clore (née Twat née Pearson) Head of human resources. Played by: Pippa Haywood
Joanna is the hospital's 48-year-old head of HR. She is (with good reason) extremely worried about getting older and spends a lot of her time exercising and eating healthily (though this won't prevent her from scoffing a huge tray of cakes in the hospital canteen). Her son is discovered later in the series to be Martin who also works at the hospital too, but she tries her best to avoid him - after all, she doesn't want anyone to know she's old enough to be a mum!
aka: Susan White Staff liaison officer. Played by: Michelle Gomez
Sue White is the hospital's Scottish staff liaison officer, which is strange because she possibly the least suited person in the world for the job. She once told an upset member of staff to "take that book on dealing with difficult people and f**k off!".
House officer. Played by: Karl Theobald
Nothing ever goes right for poor old Martin, one of East Hampton's house officers (trainee doctors). He constantly fails all his hospital exams, his mum (Joanna) tries her best to ignore him as much as possible and he is completely besotted with Caroline, though she sees him as nothing more than a friend.
Admin - Human Resources. Played by: Olivia Colman (as Olivia Coleman)
Probably the most stressed member of staff at the hospital, the admin department wouldn't be the same without Harriet bringing in a handbag full of mashed potatoes or wearing a cardigan covered in fuzzy felt animals. Hopelessly absent-minded, thanks to being the mother of three boys (Oscar, Jamie and troublesome Robbie) and wife to the unloving and her never-seen husband Ian, Harriet spends more time on the school run every morning than actually working (this might have something to do with the fact that she sometimes forgets to actually take the kids to school and so they end up running riot in the hospital carpark).
aka: Boycie; Dr. Boyce Junior house officer (later promoted to house officer). Played by: Oliver Chris
The bane of Alan Statham's life, most of Boyce's time in the hospital is spent winding up the senior consultant and trying to find new ways to suggest Alan is gay (perhaps the most spectacular attempt was projecting a lewd cartoon image on the outside hospital wall).
Senior registrar in paediatrics. Played by: Sarah Alexander
An utter perfectionist, Angela Hunter is the most anally retentive person in East Hampton. Also bright and bouncy, Angela drives Caroline up the wall yet somehow still managed to become her new lodger. However things don't run smoothly between the two, and the tensions escalated when Angela accused Caroline (wrongly) of stealing her knickers because she wanted to be her.
Admin - Human Resources. Played by: Lucinda Raikes
The odd one out in every situation, Karen never seems to smile (or in fact show any extreme emotion) and this makes her invisible to everyone else or just a target for their teasing. Another member of staff to get herself into embarrassing situations with amazing ease, one of Karen's more memorable moments was when she somehow got her hair stuck in the printer (but of course even that didn't faze her).
Admin - Human Resources. Played by: Sally Bretton
Another one of the admin staff, Kim is loud and never afraid to speak her mind. She seems to be given most of the work from Joanne but that doesn't stop her from playing games with the rest of the HR staff. She is currently embarking on a relationship with Boyce - hopefully this boyfriend won't get his sperm in her eye.
Admin - Human Resources. Played by: Katie Lyons
One of the admin staff at the hospital, Naughty Rachel has been given that name for a good reason (after all, she "always f***s on the first date"). Not known for her modesty, Naughty Rachel enjoys weighing her breasts to see how much it would cost to post one to various countries. She also regularly torments Karen.
Head of IT. Played by: Paterson Joseph
You've got to feel sorry for Lyndon Jones. He tried to quietly get on with his work in the IT department, but ended up unwittingly getting caught in a love triangle between himself, Joanna and Dr Statham - though he never had any interest in Joanna whatsoever.
Holly Hawkes (Series 2)
Played by: Sally Phillips
Holly was Mac's girlfriend for six years, but that relationship stopped after she decided to have an abortion rather than have raise a child with him.
Jake Leaf (Series 2)
Complementary therapist. Played by: Darren Boyd
Jake Leaf works at East Hampton as a complementary therapist, working with techniques such as acupuncture and primal scream therapy. He often gets visited by the likes of Statham and Joanna.