Television and film
In 2014, Christie played Amanda Hopkins in the ITV drama Grantchester for its first three seasons with James Norton and Robson Green. In 2017, she played Ellen Rooney in the BBC drama The Replacement, alongside Vicky McClure, and Dougray Scott. This role gained Christie her first BAFTA Scotland nomination.
From 2016 to 2020, she played Alison Hughes, the mother of an autistic child, in the BBC drama The A Word, for which she was again nominated for a BAFTA Scotland Award. In 2018 she also played Kirsten Lindstrom in Sarah Phelps' production of Agatha Christie's Ordeal by Innocence.
Christie starred as DS Lisa Armstrong, the lead role in the ITV crime drama series The Bay, filmed through the latter months of 2018, and aired on ITV from 20 March 2019. She received her third consecutive BAFTA Scotland nomination for her performance. It was announced on 16 February 2021 that Christie had quit the drama, which had just completed a second series.
Post her exit, she completed two independent films and the Joe Cornish eight-part drama Lockwood & Co. for Netflix.
In 2023, she led a six-part drama Payback, for Jed Mercurio's HTM label, opposite Peter Mullan, airing on ITV and internationally.
In 2024 she began shooting the role of Anna Thurman in Apple TV's Silo, and features in the third season of the television series.
In 2025 she wrote and directed short film, STRAY, and is in development as writer/director of her debut feature.