Much like my last installment in Brilliant But Cancelled -- in which I reflected on the bitingly funny genius of Chris Lilley's Summer Heights High (and hell yes, you better believe I'm excited about the recently announced Ja'mie spin-off show) -- it's technically unfair to call this week's choice a cancelled series either. That's because Ricky Gervais, like Lilley, knows that shows only have a certain shelf life. Gervais -- whose new series Derek debuts on Netflix on Thursday, September 12 -- applied that theory to The Office and, the show under discussion here, Extras.