Jeffery Willerth was in the Kosh suit, Ardwright Chamberlain provided the voice.
Neither Kosh nor Morden were regular characters, however. JMS deliberately kept their appearances down to avoid having them lose their menace and mystery, so it made more sense to credit them on an episode-by-episode basis. (There are also a limited number of budget slots for regulars, and then there's the whole question of residuals.)
Keffer was originally intended to be used more, and was deliberately made prominent so his likely eventual death would have more impact. (It isn't too often that an "above the title" star gets whacked, and the technique can be quite effective. Ask Alfred Hitchcock.) As the season developed Keffer didn't pan out to JMS's satisfication, but by that time it was too late to cut him out of the credits, so JMS just offed him in the final episode.
Regarding Zack's scene in the elevator:
</font><blockquote><font class="small">In reply to:</font><hr />
>B) How many takes did it require to get the scene?
Not many, he nailed it just fine every time.
Funny thing about that scene... we were told before filming that the script was 8-10 minutes longer than it should be, and I had to make cuts. I didn't agree, but the director was very concerned, so with great reluctance, I snipped about 8 minutes out.
So on practically the last day of filming, we get a report from the film editor that we're about 6 minutes *short*. The director suggested ways to expand the last few shots, and we could add some more CGI, but it wasn't nearly enough. I now had to write a new scene to make up the difference. (If I'd not had to make the cuts in the stuff shot to that point, we'd've been fine.)
Given that it was the last day or so, we'd already released a number of the cast, and struck many of the sets. I asked what we had left to work with. We had Zack, and Lyta, some extras...and an elevator. So with that in mind, I wrote that scene in about 20 minutes and turned it over to Jeff, who memorized the lines overnight and showed up the next morning and nailed the scene.
jms
[/quote]
And yes, JMS probably did have some kind of preliminary plans to give Sinclair a connection to the Shadows. That's what I meant when I said that when it came time to actually start plotting out the episodes in detail, JMS realized that it all seemed contrived. (Since he mentions trying several things, I assume the whole Sakai/Shadow business was only one of many possibilities. I still don't think that JMS ever meant it to track exactly with what became the Anna Sheridan story. For one thing, the Shadows are already active before Sakai could conceivably have disappeared. I think Sakai's problems would be with IPX or a similar Earth corporation with ties to the Shadows. IIRC JMS hinted at that being part of the character arc of both Sakai and Carolyn Sykes from the pilot.)
It was precisely the plausibility issue that created the problem, but I probably didn't indicate that clearly enough.
Regards,
Joe