In 2012, Flood appeared in an episode of the series Titanic: Blood and Steel, as Samuel Johanson.
In 2013, Flood joined the main cast of the new series Crossing Lines, playing detective Tommy McConnel, a specialist in weapons and tactics from Northern Ireland.
In 2015, Flood joined the main cast of the new series Red Rock, where he played the police superintendent James McKay,
In 2017, it was announced that Richard would be cast as Ford in the Showtime series Shameless
