Where can I watch / buy Avengers Assemble (TV Series)?

I've never seen the TV series Avengers Assemble (predecessor of Earth's Mightiest Heroes, which is available on Netflix) buy anywhere. The only thing I found out about was Sky, but there came hundersonstnochwas episode…

I would like to see the series in English - if anyone knew, whether it was the series anywhere at any time on DVD, I would be grateful.

So, according to https://werstreamt.es/serie/details/235163/avengers-gemeinsam-unbesiegbar/, there's the first season on Sky (ticket and go). All I found on DVDs is https://www.amazon.de/...iepilot-21 import, but there's not even a full season on it.