Australian police have charged Chris Dawson with the murder of his wife, whose disappearance in 1982 has been featured in a popular crime podcast.
The 70-year-old arrived in Sydney to a media throng on Thursday after being extradited from Queensland.
Mr Dawson has previously denied killing Lynette Dawson, the mother of his two children, saying she abandoned the family for a religious group.
A podcast, The Teacher's Pet, has brought global attention to the case.
Mr Dawson appeared in Sydney's Central Local Court via video link on Thursday, where he was denied bail.
His lawyer said he would make a formal bail application at a later date.
Police arrested the former high school teacher on Wednesday, following a three-year reinvestigation into the case.

Mrs Dawson's family told local media they felt "absolute massive relief" over the arrest.
No trace of Mrs Dawson has ever been found since she vanished from her Sydney home 36 years ago.