Another mini-themeless double header. #3 has 2 versions - American and Canadian (see blog for more details, but in short Americans probably won't know one of the long entries in the Cdn puzzle) - and is rated PG. #4 is rated MA; you've been warned. #3 is easy, #4 fairly brutal by my standards. See
http://thecrossnerd.blogspot.com/ for solutions and discussion. Share and enjoy.