Mr. Sulu in Riverdale? Oh my! Actor and equal rights advocate George Takei, whose portrayal of the “Star Trek” character on television and in films has made him a science fiction legend, is crossing a new frontier this week by appearing as himself in issue No. 6 of Archie Comics’ ‘‘Kevin Keller,’’ a series about Riverdale’s only gay teenager. Takei, who is also gay, said his appearance in the issue that is released Wednesday dovetails nicely with his real-life advocacy for equal rights because it helps bring home his message that anyone can aspire to be what they want to be no matter who they are.

A scare for Cooper