Carl Lentz's Alleged Mistress Speaks Out in Hillsong: A Megachurch Exposed Trailer: 'Toxic' 

The Discovery+ docuseries premieres on March 24 

Hillsong Church was a star-studded house of worship, but scandal has overshadowed its charismatic brand of Christianity in recent years. Now a Discovery+ docuseries, Hillsong: A Megachurch Exposed, delves deep into the headlines — including former pastor Carl Lentz.

Once a spiritual confidant of Justin Bieber, Lentz was ousted from Hillsong in November 2020, ending a 10-year tenure because of what the church described as "moral failures." Soon he publicly admitted to being unfaithful to his wife Laura, whom he married in 2003 and with whom he shares three children. Amid the fallout, Ranin Karim, a New York woman who said she met Lentz at a Brooklyn park in May 2020, alleged she was his mistress.

"It was the most toxic thing I've ever had to deal with," Karim says in the newly released trailer for Hillsong: A Megachurch Exposed, which Discovery+ will stream in three parts.

Lentz and Hillsong did not immediately return PEOPLE's requests for comment about the docuseries.

"Featuring interviews with Hillsong insiders, megachurch experts and Ranin Karim, the woman whose five-month affair with celebrity senior pastor Carl Lentz led to his downfall, the series will explore the high-profile, star-studded church's alleged exploitation, abuse and cover-ups," Discovery+ said in a press release.

Carl Lentz. Slaven Vlasic/Getty Images

"The history of Hillsong is an incredibly compelling story we wanted to explore," added Howard Lee, President of TLC Streaming and Network Originals. "Hillsong: A Megachurch Exposed will take viewers on an eye-opening journey that will provide new insights into a controversy that continues to be examined."

Never miss a story — sign up for PEOPLE's free weekly newsletter to get the biggest news of the week delivered to your inbox every Friday.

In the church's most recent controversy, Brian Houston — who launched Hillsong in Australia in 1983, when it was known as Hills Christian Life Centre — announced he'd be stepping down and focusing on a legal battle in Australia related to charges that he concealed child sex crimes committed by his late father, former preacher Frank Houston. Brian has repeatedly denied the allegations.

All three parts of Hillsong: A Megachurch Exposed will be available on Discovery+ on March 24.