The Science Flight Planning for the SOFIA/EXES Science Flight Series OC6-E (March 27 - April 11) is now under way. Initial planning shows that, because of the anisotropic distribution of proposed Cycle 6 targets, scheduling the highest priority targets imply significant, but unavoidable, dead-legs over the series. SOFIA Science and Mission Operations (SMO) is therefore soliciting Director's Discretionary Time (DDT) proposals for observations that can take advantage of these dead-legs. Proposal deadline is January 24.