Season 2, 3 and 4

I have bought DOC Season 1 a year or so more. I'm certainly hoping they come out with Season 2, 3 & 4 to buy. If they don't, I will certainly feel like I have wasted my money by buying the 1st season.

Does anyone know any information about this or how I can get Season's 2, 3 and 4.

Thanks so much from [email protected]