Thousands of attendees flocked this year's Boston Comic Con at the Seaport World Trade Center over the weekend. The annual event brought together cosplayers, artists, fans and celebrities guests for three days celebrating the worlds of fantasy and illustration. The 2016 edition featured guest appearances from William Shatner in honor of the 50th anniversary of "Star Trek," alongside "X-Files" and "American Gods" star Gillian Anderson and "Doctor Who"'s Jenna Coleman. The 85-year-old actor threw the first pitch at Fenway the night before his appearance and was greeted by Mayor Marty Walsh on Saturday who officially proclaimed the day, William Shatner Day, as you do. Check out photos from the event above.