The mysterious, throbby, sad art on the walls of Platform Gallery is like somebody you’re chasing who disappears around a corner every time you get them in view. The artists are Robert Yoder of Seattle, doing his best work in years, and New York’s Michelle Kloehn. Yoder hides layers of color and painted action under rough, dirty monochrome surfaces with enigmatic glyphs scrawled on them desperately, cultishly. Kloehn’s photographs are the sensitive exposures of the 19th-century wet plate collodion process, abstract shapes that provide the only clues to hard real things lost. (Platform Gallery, 114 Third Ave S,, 11 am–5:30 pm, free, through Feb 1)