When Josh Gates boarded the Titan sub, he quickly noticed several red flags. Watch the two-hour special #ImplosionTheTitanicSubDisaster on Wednesday, May 28 at 9p on Discovery. | Discovery

A new documentary, "The Titan Sub Disaster: Minute by Minute", just released audio of the haunting sounds heard by engineers at OceanGate's Titan Wreckage. When the submersible lost contact with its mothership, in June 2023, reports said that banging noises were being heard at 30-minute intervals. Now, that these eerie sounds have been played on television for the first time ever, they are going semi-viral. "The symmetry between those knockings is very unusual," former Navy submarine Captain Rya