Hitler's back. A mad scientist thought he could reform him; make Hitler a productive member of our future society. He was wrong. Now, the only thing standing between mankind and total oblivion is Albert Einstein. Einstein has hand picked the greatest minds in history to face off against this great evil. But who will prevail the latest iteration of The Third Reich? Or the Heroes of Science!

Annotations and commentary

Panel 4
I don't even think the word "Otaku" was in use as of 1905, but it's a well known comic convention that characters from strange foreign lands randomly add in anachronistic words into their otherwise normal sentences.
Panel 8
And Einsten's unlikely ally is revealed. Why it's a random ninja master, of course! Who'd a thunk it? But that brings this installment of Albert Einstein: Two Fisted Patent Clerk to a close.