Rashid "Rash" Masum is a fictional character from the BBC medical drama Casualty, played by actor Neet Mohan.

Casualty's series producer Lucy Raffety billed Rash as an "innocent, cautious and nice" character.

Mohan took a temporary break from the show in 2019 and upon his return writers introduced a more assertive version of the character, with his "innocence jaded".

Producers decided to focus an entire series of Casualty highlighting the pressure the NHS workforce endure.

Other stories include Mohan participating in a car stunt and dealing with grief following the death of his mother, Madia Masum (Buckso Dhillon-Woolley).

[1] Mohan's casting was first publicised by Elaine Reilly of What's on TV and the character was previewed in the show's Autumn 2017 trailer.

[5] When he is introduced into the series, Rash is living at home and looked after by his mother, making him appear as a "mummy's boy".

[5] Casualty's series producer Lucy Raffety revealed that Rash would be a "innocent, cautious and nice" character.

[6] When he is first introduced, Rash has a "preppy look and glasses" which were reminiscent of the style portrayed by established character Ethan Hardy (George Rainsford).

[5] Producer Raffety told Sophie Dainty from Digital Spy that Rash would find a friend in nurse David Hide (Jason Durr), who "takes him under his wing which is lovely.

[8] Producers created Rash's first relationship story with hospital porter Gemma Dean (Rebecca Ryan).

The story begins when Rash is determined to prove himself is the resus ward, after doctor Alicia Munroe (Chelsea Halfpenny) asks him to treat a dangerous patient, Jack MacLellan (Sam Hudson).

When Jack takes Gem hostage, Mohan believed Rash's entire demeanour changed and he "kicks into fight or flight mode".

[10] Rash's feelings for Gem continue to grow and writers used his shy and bashful characterisation to make awkward scenarios.

Mohan told Sarah Ellis of Inside Soap that "Rash is out of his depth when he's talking to women anyway, but when he's got a crush on someone, it just spirals out of control!

She accepts but clinical lead Connie Beauchamp (Amanda Mealing) orders Rash to carry out medical research.

After this Rash considers taking Jamila Vani (Sujaya Dasgupta) to a ball, but their colleagues sabotage his plans.

[1] When Gem's brother, Iain Dean (Michael Stevenson), attempts to commit suicide, Rash tries to support her through the ordeal.

Rash's mother, Madia Masum (Buckso Dhillon-Woolley), discovers the tickets and suffers an angina attack.

Mohan's departure was not publicised prior to the broadcast and this lead viewers to believe the character had left permanently.

When Rash hears of an emergency he decides to return to work and leaves his father, Ashok Masum (Kriss Dosanjh), to grieve alone.

[18] After he returns the clinical lead Dylan Keogh (William Beck) offers Rash a full time position in the ED.

In turn, Ethan passes his duties onto junior doctors, including Rash and Mason Reede (Victor Oshin).

[21] Ethan is supposed to be their mentor offering support but he is preoccupied and suffering from Posttraumatic stress disorder (PTSD).

Rainsford branded it a "big storyline" focusing the "true reflection" of NHS staff "struggling under the weight of their responsibilities.

[22] Oshin told Ellis (Inside Soap) that Mason received a negative reaction from Casualty viewers because Rash is well liked.

[23] The actor explained that Ethan accuses Rash of negligence and launches a verbal attack about his family problems.

[20] Rainsford found the story difficult to film because he knew Ethan was "being hypocritical" and "acting out of character" towards Rash.

[32] Joe Julians from Radio Times wrote that Rash is "quite the charmer, something that comes in handy at work when it comes to having a good bedside manner.

"[33] Sarah Ellis (Inside Soap) branded Rash a "shy" and "jumpy F1", adding that he is a "hot doctor".