4-T belonged in the era of old-fashioned analogue TV sets with their cathode ray tubes and valves - hence some of the references in this, his first adventure. This version of the story was originally offered as a partly-interactive disk for the BBC microcomputer (but this video is not interactive, sorry)
This was almost the last - and certainly the longest - of 4-T's adventures, in which he and sidekick Wiggly help an absent-minded Wrabbit recover an ancient object with magical powers. This version has been reconstructed without the original weekly "the story so far" titles, although the "more next week"-type trails remain
Like the first story, this was shown on Channel 4's 4-Tel teletext service and was also issued as a disk to run on BBC microcomputers which were in widespread use at the time. (There are one or two minor display errors in this video version, due to errors on the original floppy disks).
Perhaps appropriately, part one of this story has been lost in time, so we start with episode two... 4-T has discovered that images of his friend Vince the Valve have vanished from his photo album...