Linden struggles to control his emotions when he finds graffiti on his wife's grave. Jac falls victim to a dangerous lung condition, and Elliot resigns from the charity.

Connie struggles to cope as her daughter Grace fights for her life, and Elliot realises she needs support. Linden's odd behaviour around Chloe goes on.

The shootings in reception push everyone to the limit as staff struggle to treat the victims, their own colleagues among them. Amid the devastation, Elliot blames himself.

Elliot is in a terrible mood after learning of James' arrest - which has repercussions for the rest of the staff when he takes it out on the already stressed STI nurse Tim.

Mark makes a near-fatal mistake at work, but continues to deny he has a drug problem - until Chrissie finds a stash of cocaine in his desk.

Sam cannot concentrate after his diagnosis, but has to continue work due to to a staff shortage. Mark too is overstretched, and his drug habit leads to paranoia.

Sam tells Maddy and Elliott he's all-clear but they're unsure he's collected his results.

Maddy convinces Sam he may have chlamydia, but the tests reveal a more serious problem.

Kyla's drinking at work leads her to make a serious mistake.

Jac learns a consultant's post is available on Keller.