The Queen Mary is used to represent the Titanic.
This episode takes place in three different settings: aboard the RMS Titanic on April 14, 1912, France in 1884 and Paris on April 15, 1912.
This is the only episode of the series to not show the green light resolution of the primary problem on the Omni.
This is the only episode of the series to not show the time jump when leaving the primary problem era for the second time.
There is a fictional subplot which has the three voyagers trying to recover Leonardo da Vinci's painting of the Mona Lisa, which was stolen on August 21,1911 from the Salon Carré in the Louvre. It wasn't until December 1913 that the painting was recovered.