If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
If you have sky plus then you probably have sky anytime (though this may be a condition of having sky b/band too, i am not sure). If you go into the tv menu, it is the red button option. You can then filter by catch up, sky channels and Glee is listed there.