Destination Deimos

Destination Deimos is the fifth episode in the English dub, and one of only two episodes whose setting is in space. It also featured Astro's only interaction with aliens in the '03 series.

Plot
The mining robots on Deimos seemingly go berserk, and its up to Astro to uncover the real reason - before its too late.

Astro learnt about his digibeam and the rockets in his arms here.