Re: Silly Valley
You really didn't miss much - Aftermath suffered from a very bad rehash of previous seasons ship footage into the clunkiest battle sequence unimaginable. It made the unmanned ore carrier & Nova Queen collision from Star One look good (& it got rehashed (with one of them switching sides) into the battle in the futile hope that the viewers wouldn't notice).
Fortunately all that crap ended once Liberator emerged damaged from the battle (with the nice fly past of two federation pursuit ships). I'd go so far as to remove the opening minutes if I'd been the director\editor.