FESTIVAL: One of the best Mission events of the year is happening tonight with the annual Dia de los Muertos procession and Festival of Altars celebration. Bring candles in glass containers to honor your loved ones who've passed -- no open flame candles are allowed at the park. (7 p.m., procession starts at 22nd & Bryant, runs down to 24th and over to Mission, then back up to 22nd; 6 to 11 p.m., Festival of Altars, Garfield Park)

LITERARY: MythBuster's Adam Savage will be interviewing Mary Roach, whose latest book, Packing for Mars: The Curious Science of Life in the Void, is this year's One City One Book selection. Before the conversation, there will be a screening of Rockets of Yesterday, curated by writer, archivist and space enthusiast Megan Prelinger. (5:45 p.m., Koret Auditorium, Main Library, 100 Larkin Street)

FILM: Concluding Roxie Theater's Spooktacular event tonight is the world premiere of Mindglow, in which a "tainted burrito leads to a pregnant man leads to INS troubles in this surreal comedy that could serve as an extended warning about dental health, along with live performances by Bay Area bands Bronze (locked-groove panic jams) and Limosine (ritualistic face-melting). (7:30 p.m., Roxie Theater, 3117 16th Street)