(11 Sep 2015, 6:43 pm)GX03 SVC wrote New X66/X67 timetables available online - https://www.arrivabus.co.uk/GetTimetable...025-151208
Improvement with a later departure from Darlington back to Teesside. However, the last bus in the opposite direction is now 1925 - presently 1942. Also of note is no journeys there extended from Darlington Town Centre to Faverdale Depot.
EDIT: Leaflets about the improvements are now available in the Middlesbrough Travel Office as well. See below for the map (only shows the Monday-Saturday daytime routes - evening/Sunday X66s additionally run via Hartburn)