The beautiful “Wonder Morton” pipe organ made its debut in the Arlington Theatre (1317 State St.) in 1988. On Sunday, October 5, at 2 p.m., join the S.B. Theatre Organ Society in celebrating the Wonder Morton’s 20th anniversary with a performance by renowned organist Scott Foppiano, who will play favorites and accompany two Laurel & Hardy silent movie comedies. Tickets are $11; children younger than 16 get in for free. Call 685-9891 for more info.