It seems slightly odd, given that there are different traditions of between-sentence spacing, that there doesn't seem to be a Unicode character for the kind of space between sentences.
Mr.^Smith^turned^off^the^lights.^^Then^he^went^to^sleep.
Knowing that "Mr. Smith." is intra-sentence but "Me. Smith." is inter-sentence is well beyond what fonts can do, however.
Mr. Bean is in one sentence, not two.