Go on I-tunes and take it off your I-pod touch.
Plug it into Itunes and go to ur podcasts there, deleet the podcast from your iTunes then sync your iPod agin
oh you tap the ipod button then go to more then select podcast after that select the podcast series and you are in the episode section slide your finger sideway and a small delete button will show up...
Search "how do you get podcasts off of ipod" in the search section above
ok first what you do is press property's then advanced idk witch one but then change the settings to not inherited and then save+cancel+delete it