Who can blame Lily for feeling jealous?

Iain and Sam have been flirting outrageously since they started working together again, and if there’s one thing Dr Chao is rubbish at, it’s banter.

Tonight, she tries to bury her feelings, and even turns down an exciting research post to spend more time with Iain – but will she live to regret it?

Meanwhile, Louise is on to Dylan about Sanosi, and David puts pressure on him to come clean. The worst is to come when Connie grows suspicious, too.