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Matthew talks to Murilo de Toledo Tiecher, a survivor of the fire in a Brazilian nightclub in the city of Santa Maria which killed 237 people. As investigations into the cause of the fire continue Murilo, a 26 year old medical student who had gone to the "Kiss" club with his friends, describes how he escaped.

Also, we hear from Susannah Cahalan. She was working as a journalist for the New York Post when out of the blue, she began to suffer from paranoia, depression and hallucinations. Eventually, Susannah ended up in hospital and was diagnosed with a rare neurological disorder. She's better now but she tells Matthew about her temporary descent into madness.

Picture: Brazilian firefighters tackle the blaze outside of the Kiss nightclub in Santa Maria.

Picture credit: AFP/Getty Images