Oh I hear you, Big Bang re-runs took up half my Sunday!
You'll be fine Mathkitty, if in doubt give them a graph or gantt chart, always gets me off the hook in style ;-)
In terms of getting started, I usually start with a one slide review of my last presentation or work to that date. Then move into the plan (that I obviously made and stuck to religiously) for the work I've done since. Then results, then analysis and future plans. I also tend to include at least one point on which I ask for input, keeps em awake and means I beat the arsey ones to the punch for questions!