Irwin Allen became known as a special effects wizard because of this series which was the most successful. The photography in it was always great, & Allen knows how to create effects. The SeaView - the main sub in the show would still be futuristic today. Of course the ideas for this series was spawned by the movie that preceded it with the same name.
Richard Basehart & David Hedison were great choices to be in command. They carried the dialog real well & there were plenty of good name guest stars in episodes too. Once in a while a pretty woman would stop in for an episode but most of the time the male cast carried this show to the top for ABC.
Later in the series, they introduced a flying submarine, something which in reality has still never been created. This show can really fire the imagination with how it worked. Now that it is on DVD, it might get some more new fans. As for Irwin Allen Productions, while they have done more recent work, since 1982's Code Red, there has not been as much success as this & the 60's & 70's stuff they did.