See You Down There is the 23rd broadcast episode and 28th produced episode of British television series Joe 90.
Joe 90 uses a variety of brain patterns to bring about a man's reformation.
Ralph Clayton is a financial shark. He will use any method to squeeze a rival into submission, but is clever enough to stay just inside the law. One of his victims is Harris, the owner of a small engineering business. Harris in the past has done valuable work for W.I.N. but at present he is in Clayton's clutches. W.I.N. decide that Clayton should be taught a lesson. Professor McClaine goes to his office and tells him that he has slipped a drug into the tea he has just drunk. This drug will produce hallucinations which will continue until Clayton changes his ways and he is given the antidote. There is, in fact, no drug. Sam, Shane, Mac, and Joe then proceed to convince Clayton that he is seeing things. They do this chiefly by giving Joe a series of brain patterns which enable him to do things a nine year old would never be able to do normally. Clayton is scared into submission, becomes a new man and swears in future he will be honest.
- Joe reads issue 183 of TV21 magazine towards the beginning of the episode, whose cover features Captain Scarlet after his capture by Captain Black in the Robot Challenge! serial.