Late night train from Venice to Florence

I'm having trouble finding a return train after dark from Venice to Florence for Sept 15. The latest I see is a 7:25 departure and we really wanted to stay after dark. Can anyone help? Thanks so much!
Thanks for your help! I will look into the car options, as we are introducing our kids to Venice quickly and would like them to carry the image of St Mark's Square at night with the bands playing in their hearts til they can return on their own!


Late Night Train From Venice to Florence June 2015

I too am interested in a late night train from Venice to Florence.
I just read the thread from August 2014.
Has there been any changes for 2015?
If not, any suggestions for a reasonable alternative? The private tours are $300 and up for 1 person.