Dr Turner and Nurse Crane must deal with an alarming outbreak of diphtheria. Fred finds an abandoned baby in a dustbin, and the team must help locate its mother.

Lady Mary’s meddling gets Mr Carson into trouble with Mrs Hughes. Cora and Violet lock horns over the hospital takeover plans. Robert has a tough decision to make.

Sarah Bunting continues to cause waves above stairs, but this time she may have gone too far. On returning to Downton, Thomas suffers an inexplicable illness and Baxter suspects there’s…

Simon Bricker returns to Downton to discuss the painting with Cora. Branson makes a difficult decision about Sarah Bunting. Rose encounters a handsome stranger. Determined to stop Isobel making the…

Relations between Robert and Cora continue to be strained. Blake’s scheming starts to come to fruition when Mary is unexpectedly pitted against her love rival. Edith receives some terrible news…

Mary’s secret assignation is very nearly blown, but Violet’s quick thinking saves the day. Robert is left red faced and furious when things do not go as planned. The events…