This is a Junichi Miyashita episode, and I really like it. Not only is Miyashita actually pretty good at writing stories with kids, he puts them in some pretty intense situations when he does. He also wrote the episode about the boy bitten by the snake, and the girl who fell from the roof. He went on to write Resident Evil: Code Veronica, several Kaito Kid episodes of Detective Conan, and the Magic Kaito series, and the Hurricanger 10 Years After film.
When Ryoma is being watched by Kanzaki's goons, the method he uses to get his message to Commander Masaki is nothing short of genius. And when Masaki shows up to help out Ryoma... it's one of the reasons why I will say without question that Hiroshi Miyauchi is one of the most enjoyable actors in tokusatsu.
The song in this episode, called "The Big Grandfather Clock", and there is a history to it. You can hear the whole song here:
The song is actually taken from a song from 1875 by Henry Clay Work, and in fact is supposedly where "grandfather clocks" get their name from. In the 1940s, the song was brought to Japan and translated. The lyrics are different in Japanese, so I included the Japanese ones for fun. The English ones can be read here: http://www.theclockdepot.com/history_of_the_grandfather_clock.html
Torrent link: http://www.nyaa.se/?page=view&tid=718246