Zosia is put in an impossible position in Tuesday´s Holby City

Zosia is puzzled by Guy’s increasingly erratic behaviour, and starts to suspect he’s drinking on the job.

Divided between doing the right thing and protecting her dad, Zosia makes a decision with devastating consequences.

Meanwhile, Donna’s ex-husband makes a shocking visit to the ward, putting Donna in an awkward situation. He claims he’s changed his ways and wants to win Donna back, but what will Donna decide to do?

Elsewhere, the Keller team are surprised by Dominic’s friendly and efficient outlook today, and Oliver is impressed he’s completed all of his best man duties. But when Lofty questions Dominic, his façade begins to crack.