#41: The Enterprise meets God, and it’s a child, a computer, or a C program.
#42: While boldly on the way to where only a few people have been recently, the Enterprise computer is subverted by a powerful alien life-form, shaped amazingly like a human.
#43: Trekkers encounter hostile computer intelligence, and abuse philosophy or logic to cause it to self-destruct.
#44: Trekkers encounter a civilization that bears an uncanny resemblance to a previous Earth society.
#45: Disease causes one or more crew members to age rapidly. Also seen in reverse: key crew members regress to childhood, physically, mentally, or both.
#46: An alien being becomes embedded in body of a Trekker and takes over. Still waiting ...