2. On this Halloween eve at 5 p.m., join the Spirits of Charlestown Historic Ghost Tour, a 90-minute walk that leaves from the Fountain at City Square Park and travels along the Freedom Trail in Charlestown. You'll find out who is haunting each historic site. The tour covers the time period from 1630 to 1850. Buy your tickets on line at www.spiritsofcharlestown.com for a $5 discount per ticket or call MaryLee at 617-242-4682.
3. Every Wednesday, join the Charlestown branch of the Boston Public Library After School Club for Lego Wednesdays where kids can create with Lego and Duplo blocks from 2:30 p.m. to 5 p.m.
4. Whole Foods Market's Healthy Eating Specialist Hannah Grenier is hosting a . class at 6 p.m. on having a Healthy Halloween at the Charlestown store at 51 Austin St.
5. Today is the 75th anniversary of Orson Welles and the CBS Mercury Theatre on the Air performance of their version of H. G. Wells' The War of the Worlds. With the country on edge due to years of economic depression and from the recent "Munich" crisis that nearly brought war to the world, many of the nearly six million around the country who heard the radio play believed that Martians were invading the earth. Word quickly spread and many panicked hearing the "news." If you never have heard the broadcast, treat yourself by going to Youtube for a taste of great radio.