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Siblings Penny and Oliver Valentine come to blows this week, as Oliver’s doctor training is upgraded to F2 level, while Penny remains an F1.

When the pair work together on a case, Oliver’s lack of competence comes to the fore and he upsets a patient who happens to be an old friend of Connie’s.

Reprimanded for what he thinks is Penny’s mistake, petulant Oliver blurts out Penny’s big secret – that she had an affair with a patient, Scott. The revelation stuns Penny, knowing that implications of this becoming public knowledge could have devastating effects on her career…

Elsewhere, Maria finds herself working hard to cover for Donna, whose parenting duties with Mia are getting in the way of her job; Mark starts to consider applying for the CEO position after all.