This installment was originally published in Look and Learn issue no. 406 on 25 October 1969.
The Deadly Formula (continued . . .)
This installment was originally published in Look and Learn issue no. 402 on 27 September 1969.
The Three Aliens (continued . . .)
This instalment was originally published in Look and Learn issue no. 297 on 23 September 1967.
