[1] She played consultant anaesthetist Annalese Carson in Holby City and Sarah Gardner/Osiris in Stargate SG-1.

Plowman and Stephens performed together as Sibyl and Elyot in Jonathan Kent's revival of Private Lives for the 2012 Chichester Festival,[2] reprised at the Gielgud Theatre in 2013.

[3][4] From 2016 to 2017, she played chamber maid Mrs Hudson in the series Black Sails, which also starred Toby Stephens.

In May 2007, Plowman and Stephens had their first child, a son named Eli Alistair.

[5] British playwright Simon Gray, who wrote Japes, a stage play, and Missing Dates, a radio drama, both of which starred Stephens, was Eli's godfather.