★★★ Here are two full episodes of this sci-fi blockbuster, a lively part of the Stargate franchise — the part involving the poor sods rambling around space in a spaceship too decrepit to return home. In the first episode, the secret base is attacked by an unknown enemy. Nasty. In the second episode, the evacuees discover the life-support system on their weatherbeaten old hulk Destiny will fail in a matter of hours. Tricky, eh?