There are some episodes located at the official ABC site here but they only have available 3x18-3x22. You can also try Hulu which if you don’t have an account, you might get the first week free so you can try that as well! Season 3 will be out on dvd/blu ray around August! If Netflix had all 3 current seasons (they only have the first and second season) that would have been your best choice!
Netflix most likely will have season three after the entire dvd is put out and since the fourth season doesn’t start til September 28th, you have plenty of time and options!
If followers have any other suggestions, please answer here?
This website is a good place:
Also, season 3 is up on iTunes if you want to buy the season or individual episodes!