Fictional Universes Draw Close

Larry Niven wrote his kzinti into Star Trek;

a Klingon knowledgeably quotes Shakespeare, including Hamlet;

Poul Anderson wrote a kzin unconsciously echoing Hamlet;

Hamlet is real in Anderson's Shakespearean timeline;

Merau Varagan refers to the Time Patrol's exile planet as:

"'"That undiscover'd country from whose bourn No traveler returns."'"
-Poul Anderson, The Shield Of Time (New York, 1991), PART TWO, 976 B. C., p. 43.

Not for the first time, we think that it is all one multiverse.