According to the official website, both shows are returning with "All-New Episodes this summer." ''Ghost Hunters'' season 5 starts on June 17 at 9:00 p.m. eastern, but there doesn't appear to be any scheduling information past June, so it is unclear when ''Ghost Hunters International'' will be back.
Source(s):
http://www.scifi.com/ghi/
http://www.scifi.com/ghosthunters/
http://www.scifi.com/schedulebot/i...