It was the dawn of a new age—the rise of sci-fi shows with story arcs, complex characters, and computer-based special effects. “Babylon 5” was a trailblazing TV series and we give it the treatment it deserves in this double-sized episode. The curious can join us for a lengthy pre-Spoiler Horn conversation about why we like the show, and the veterans can stick around for detailed, spoilery conversations about where the show went during its five seasons on the air.