The Second Coming of Leonard - S1-E15
Easter egg: When you are on the menu for The Second Coming of Leonard, press up. You will then be treated to another unadvertised outtake.
Jewbilee (3) - S3-E9
Easter egg: On the set up menu in Disc 2, highlight the feature that is next to Moses. Hit left. This will Moses shoot laser beams out of his eyes. With his mouth open.
Easter egg: On Disc 2 of series 2, enter 'Anglian Alan', press up once to highlight a video in the background, press enter to see fictious credits to Crash Bang Wallop What a video.