A former reality television contestant has appeared in court during a committal hearing over an alleged multimillion-dollar “boiler room” telemarketing scam.

Married at First Sight groom Daniel Phillip Webb and 10 other people are charged with fraud, while some also face money-laundering charges.

The prosecution argues the scam raked in about $24 million from hundreds of victims in 2013 and 2014.

Mr Webb sat in the public gallery in Brisbane Magistrates Court on Tuesday while his lawyer asked for them both to be excused until two witnesses take the stand later in the hearing.

Daniel Webb during his time on Married at First Sight.

It is alleged the scammers ran a call centre, referred to as a boiler room by police because sales people pressured unsuspecting victims to invest money thinking they would make good returns.

Police allege the companies would then disappear, being replaced by another entity that continued to operate the alleged scam.

The court heard those running the operation allegedly used associates as signatories behind companies and bank accounts into which money was deposited and then withdrawn.

The committal hearing has been given evidence from some witnesses who have been indemnified from prosecution due to their involvement in the scam.

About 500 people are named on the witness list for a trial, with about 35 due to take the stand during the three-week committal hearing.

Mr Webb faces charges of fraud, along with Kirsty Maria Lester, Patrik Rasmus Gorannson and Charlie Mikael Gorannson.

Travis Charles Burch, Robert John Doueihi, Nicholas John Forbes, Vincent Alexander McDonald, Natchamon Srisunanrat, Douglas Owen Traynor and Jason Troy Trouchet are charged with fraud and money laundering.

The hearing continues.

-AAP