Their depositions hearing has tentatively been set down for three weeks beginning on October 26.
In December 2007, 96 medals, nine Victoria Crosses among them, were stolen from the central North Island museum.
All the medals were returned in February 2008, after a reward of up to $300,000 was paid.
In February last year Campbell screened an interview with a man called "Robert", who said he had taken part in the burglary.
Viewers saw a man wearing a hood with his face in shadow being interviewed by Campbell. The audience was told an actor's voice had been used to protect the man's identity.
Campbell and TV3 later admitted they had made a mistake by not telling viewers that the interview was a re-enactment which used an actor.
- NZPA