Here's a couple of gags which you may not have seen - wasnt until 3rd or 4th viewing that i spotted them....
102 - I Never Met The Dead Man the first star trek scene peter is watching on the telly - at the end when captain (kirk?)'s pants rip his underwear has 'captains log' written on them.
314 - Peter Griffin - Husband, Father, Brother (about 8 minutes into the episode) when Brian is reading the diary (Ned Griffin?) and stops to mimic/read out the laugh (ha-ha-ha-ha-ha, like Peter's), if you freeze the video when he holds up the diary you can read on....
"she's just a horse, but i could tell she knew she was out matched ha ha ha ha ha. I stepped in a cow poop this afternoon. It was so funny that i almost pooped MYSELF but luckily i didn't."
so now you know :-)
ROg