Here, Cassidy spills on episode 4, ‘Science and Magic.’

Here, Cassidy spills on episode 4, Science and Magic.

This is what the mysterious Jane claims to have made Jack.

Emerald City - Season 1

Credit: David Lukacs/NBC; Brad Barket/NBC/NBCU Photo Bank via Getty Images

But Jacks heart was lost long before Jane replaced it.

Jacks heart was lost when he lost Tip.

Tip will give West his service if West will give Tip her magic.

But will West keep this deal?

And what kind of service is Tip willing to provide?

Meanwhile, Jack finds himself in the company of an interesting strange princess obsessed with masks.

But what could a princess possibly want with a tin man?

Finally, there is Dorothy and Lucas.

So surrender, Dorothy.

Emerald Cityairs Fridays at 9 p.m. on NBC.