Doctor Foster star Suranne Jones has promised the BBC1 hit will have an "amazing ending". Here we ask the four BIG questions we want answered....

Doctor Foster star Suranne Jones has promised the BBC1 hit will have an “amazing ending”. Here we ask the four BIG questions we want answered….

1 What’s going on with Kate?

Doctor Foster Kate

We’ve not seen nearly enough of Simon’s lover-turned-wife Kate (Jodie Comer). What was that mystery wedding present Gemma gave her and was the strange man that Gemma saw her kissing really her godfather? “We will see more of Kate and find out about her,” promised Suranne.

2 Does Sian have another secret?

Sian Doctor Foster

Gemma’s gay colleague Sian (Sian Brooke) knew Simon at university and has reported back on Gemma to him, but is she still scheming? “Sian seems to know more about Gemma than one might expect,” hinted writer Mike Bartlett.

3 How did Simon turn Tom away from Gemma?

Doctor Foster

What awful secret did Simon tell Tom about his mum that led the teenager to pack his bags and move in with his dad? “You’ll find that out,” said Tom Taylor, who plays him. “He never really knows who is the more honest parent and his frustration just builds up…”

4 Will Gemma kill Simon?

Doctor Foster Simon

Is it wrong that we’d love to see Gemma wipe the smirk off cheating Simon’s face permanently? Could the bloodstained publicity shots and Gemma’s access to drugs ensure that Simon’s vow to only leave “in a coffin” comes true? “I don’t want sympathy for Simon but he might get a bit,” teased Suranne.

Doctor Foster continues on BBC1 on Tuesday at 9.00pm.