Sebastian Grayling

Sebastian "Seb" Grayling is an F1 junior doctor who started working in the Emergency Department of Holby General Hospital in October 2016.

Trivia

 * Seb's father, Archie Grayling, is one of Holby's top surgeons.
 * Dylan offered to be Seb's mentor.

Behind the scenes
Rik Makarem portrays Sebastian on Casualty, and likely began filming in summer 2016. He was first seen in the Autumn 2016 trailer which was released on 31 August 2016. Prior to this, neither the character nor Makarem's casting was known.

Although it was revealed that his first appearance would be in November, Makarem made his first on-screen appearance on 29 October. This error was a result of the merging of episode 1 and 2 of the series which essentially brought all airdates forward one week as well as the episode numbers in the series being shifted down one.