Astro Viewer Working:
• Cassiopeia speaks several of her lines backward in this episode:
    “Oh, Pop!  Something terrible has happened.  I feel perfectly normal Pop, but I’m talking backwards!”
    “I’m talking normally, but everything I say comes out backwards!”
    “It’s awful not being able to talk.” “Pop, I’m sorry Pop.”
    “I want you to do it!” “Aw, please Pop, please Pop!”
    “I must say I’m getting rather nervous.”
    “No!” “Yes.”
• Irya’s voice is different.
• Interestingly one sequence, seemingly shot for Message From A Star but unused, turns up in this episode. In the Galasphere, when Irya tells the crew about our Sun seeming like a star from Alpha Centauri - the costumes and postions of the crew are identical to scenes just after the Galasphere lands on Delta in the earlier episode, though Irya's voice has been redubbed. In Message From A Star, Irya says the same thing to Raeburn over the monitor in his office, suggesting a change in the script.
• The Deltans have blackboards and chalk apparently, though how they use it without arms is anyone’s guess.

Hoorah!:
• By accident or design, the reflections of light on the dome of the brain resemble a pair of small gleaming eyes and, in some shots, a kind of small grinning mouth.
• Its callous malevolence at Dart (see Notable Quote above) is also a nice arrogant touch that makes you wish it had also become a regular threat.

Boo!:
• Where did the Great Brain get the metal to build its robots and control room from. Surely they’re not made of lizard horn too ?

Computer Central:
• Another episode not to feature Libby Morris.
• First screened: June 4th 1964 (Associated-Rediffusion London)
• Running time: 24 minutes 35 seconds
• BFCC Classified - 9th August 1999
• VHS - Volume 9
• DVD - Complete Series Box Set, Disk 6

Listings
• London, June 4th 1964:
Professor Haggarty uses his daughter as a subject for a strange experiment, which ends still more strangely and affects events in another galaxy.
• Tyne Tees, June 15th 1964:
A Martian professor invents a machine which breaks down atoms and transmits their pattern to another Machine, which then rebuilds the pattern. People can be transmitted in this way and Professor Haggarty's daughter Cassie volunteers. She comes out at the other end completely perfect - except that she talks backwards! And nothing can cure her...

Ready To Lift ?:
This seems initially promising with the development of matter transmission before turning into another hybrid episode, reusing and mixing elements of The Robot Revolution and Message From A Star but never really developing any of them.

On to the next episode