Karl moves into a flat and the distance between Karl and Susan is widened when an old university friend, Martin Chester (Gil Tucker), arrives in Erinsborough and comforts Susan.
She kisses Martin, but realises she loves Karl and they reunite.
Susan rejects Karl as she cannot remember him and decides to divorce him. Soon after, Susan falls in love with Karl again and they decide to remarry.
Susan regains her memory halfway through their vows.
He develops a close friendship with her and just before she leaves, they share a kiss.