After look at this post and the very relevant question about do people actually use OOP in the course, I really should highlight that it is indeed used in real code.
Ross and I spent a day looking through some source code of some fortran programs that are heavily used on our clusters. We found many occurrences of things like interface, type(), extends, etc. that are associated with OOP style programing. It would be good to focus a little more effort on this and to put some text in the intro about this to help motive the course.
I raced through last two episodes(probably covered about 30 mins of material in about 5 mins). Ross took an extra 10 mins as he wasn't able to cover pointers. I also skipped one exercise (5 mins). This suggests that I am probably around 20 mins long at least.