Oh well, this seems to be compulsory... Sorry for repeats, but maybe it makes up for the BBC being so stingy with them?
1) The Way Back: Havant's speech: "Reality is a dangerous concept. Each one of us interprets it in a slightly different way. Every sense impression is filtered by the brain and altered, sometimes just a little, sometimes completely, to fit our individual model of what the world is about." He speaks with a forked tongue, but he tells the truth!
2) Space Fall: The first moment we see the Liberator. Oh, it's just so beautiful...
3) Time Squad: Cally's first entrance - her wonderful, fierce vitality.
4) Seek-Locate-Destroy: Our first meeting with Servalan, not to mention Bercol and Rontane. Thank heavens we got a second bite of those two in Trial, but why couldn't we have a nibble every other episode?
5) Redemption: "What shall I do with the other hand?" The whole Blake-Avon interaction, but this sums it up...
6) Shadow: Cally fires on Space City. That's our girl!
7) Pressure Point: Kasabi's death scene. I've said it before, but why let that stop me: I may love Servalan, but at that moment I love Kasabi more.
8) Trial: Hurrah, the Return of Rontane and Bercol! The whole Travis plot, especially when he says "Any more than I do" after Par has left.
9) Voice from the Past: The politics, you apathetic lot! Er, yes, and Avon in a black shirt grabbing Blake doesn't do it any harm.
10) Gambit: Avon and Vila tricking Orac, particularly Avon's delivery of "and neither, as a matter of fact, do I", plus the hand movements. It's all ridiculous - they obviously have to brief Orac on what it's all about before they reach the casino, but it's delightful anyway.
11) Gambit: Chenie, Docholli, and that coat.
12) Gambit: And, of course, the star of Blake's 7, Jarriere, ruefully shaking his head at Servalan.
13) Star One: "I want to be free of HIM."
14) Star One: "I have always trusted you, from the very beginning" - I'm with Una on this one, I think Blake is deluding himself!
15) City at the Edge etc: Vila coping with Bayban's psychopath act. Actually, I love Bayban's psychopath act, especially the bit about his mother calling him Babe.
16) City: "It's a pity we're not all as reliable as Zen." "But I thought you were..." And people think Cally has no sense of humour.
17) Rumours of Death: Anna's triumphant smile when her men break down Servalan's door. Oh yes, and the earlier bit where she's sitting slightly apart from her troops, psyching herself up for action. I love this woman.
18) Moloch: Embarrassing as it is to mention a Steed script, "If it comes down to that, Tarrant, there isn't really a lot of point, is there?" I love the way Vila suddenly acts his age and leaves Tarrant in confusion.
19) Terminal: The pale faces of Avon and Blake reflecting each other in the dark.
20) Blake: The End. Thank god they never tried to follow it. Er, what's that you say about a movie?