But they all discover her now lifeless body in the box, and she was believed to be dead until appearing in the closing seconds of the Season 7 finale episode 'Under Siege Part 2' confirming she is indeed alive.

How does Joan die in Wentworth?

Charged with conspiracy to murder, Ferguson returned on remand to Wentworth. After being acquitted of all charges, within seconds of freedom, Bea Smith executes her own suicide by impaling herself on a weapon held by Ferguson – revenge for Ferguson's attack on her lover Allie who Bea believes has died.

Does Joan Ferguson die in Season 8?

In season 8 Joan Ferguson returns, and it is explained how she escaped death after being buried alive by Will Jackson.