"Hengist" is such a great character name. It sounds close enough to "heinous" that it immediately gives you a squirrely feeling.
It's basically the old German equivalent of using "Hartigan" or "Roarke" as a character name - the key element being a raw animal sound chosen for its onomatopoetic effect of masculinity. In this case, the neigh of the stallion it stands for...
I wonder if Trek ever has managed to apply a character name that is without an Earthly precedent of some fame? Plenty of important Odos around, say.
I always thought that the pscho tricorder would read Scotty's memories and be able to play them back for others to experience.
In that case, wouldn't the heroes use it? I mean, Scotty didn't bash it into pieces or anything.
There would probably be "others" around Scotty during the use, then, too, instead of this privacy.
Not having such an ability meshes better anyway with the lack of such an ability in all the other eps where truth serums or mind melds are required instead.
Timo Saloniemi