How can I chain a DVI display into a Thunderbolt display (and then into a MBP)
The Thunderbolt Display can't daisy chain other non-Thunderbolt Displays. Per Apple Support article HT5219:


  Can I connect a Mini DisplayPort display to my Apple Thunderbolt Display for computers that support using more than one display?
  
  Mini DisplayPort displays will not function if connected to the Thunderbolt port of an Apple Thunderbolt Display. Displays connected via Mini DisplayPort video adapter or cable to the Thunderbolt port of an Apple Thunderbolt Display will not work.


You'll have to connect the second display to the second Thunderbolt port (or HDMI port) on your rMBP.