Question: how to watch old episodes of jersey shore?
Answer: Hulu. Rejoice! Hulu's got six seasons — that's 74 eps — of Jersey Shore streaming. ... 
Amazon. Jersey Shore is also available for purchase through Amazon Video.
Vudu. You can own all six seasons of the reality show via Vudu. Yeah, buddy!
iTunes. There's the option to buy the reality series on iTunes as well.