If you check out the tv listings for channel 4 next sunday (21st) it has invasion lasting for 2 hours, 8 - 10pm, so could they be showing them back to back or is it a typo?
http://www.channel4.com/listings/C4/index.jsp?offset=6&position=6

I can only see one episode, 8 til 9 like normal. That will be last night's e4 episode!

Ah yes, mine is showing that now too! stupid computer!! oh, but now mine is showing it on E4 at 9 next week. so my comments before about them not showing episodes in advance on digital were obviously wrong! but if it only means a week of wait i dont care!
http://www.channel4.com/listings/E4/index.jsp?offset=6&position=6&startHour=17

no it was 9 - 10

I hope it dont coz i love it lol

E4 are showing the last episode of Invasion at 9 o'clock Sunday. It's called 'The Last Wave Goodbye'.

Here's the link -
http://www.channel4.com/listings/E4/index.jsp?offset=5&position=5&startHour=17

So this should be shown on channel four on the 28th.