Companion adds a dose of archive to a contemporary-art exhibition by pairing new works with the objects or images upon which they're based. The EFA Project Space group show is curated by Marisa Jahn for REV-, a new nonprofit collaborative aiming to shake up the contemporary arts scene. Jahn has brought together a diverse group of multimedia artists like Pablo Helguera, who remakes a 1950s television show for the YouTube generation, and Cui Fei, an installation artist whose hatch-marked assemblage demarcates the passage of time during the Sino-Japanese War.