>sometimes in pieces of the plot which get revisited or continue through several episode (like Nicole's line in L&O - CI which is in its third season now). And some lines of Star Trek were continuing, like the whole DS9 and several lines in the Enterprise.

FWIW, they call those multi-episode plots "story arcs."

>Here you mean the theatre in the British sense, with live actors, I presume. In the States, if you say theatre, they first mean theater, where they run movies.

Not necessarily. To me, "theater" or "the theater" is live performance. I say "movie theater" or "the movies" for the other.

Tamar