For its final production of the 2017-18 season, the Minnesota Opera is venturing over the river and outside the confines of the Ordway to Minneapolis’ Cowles Center for a performance of Fellow Travelers. Composer Gregory Spears and librettist Greg Pierce adapted Thomas Mallon’s 2007 novel set in 1950s Washington about a neophyte political operative eager to join Joseph McCarthy’s anti-communist crusade. His connection to a State Department official transcends the professional, and the two men begin a secret love affair. Their relationship and their careers are threatened by McCarthy and his cohorts’ increasing paranoia over the confluence between communists and “sexual subversives”—also known as the Lavender Scare. Theater Latte Da co-founder Peter Rothstein directs co-stars Andres Acosta and Hadleigh Adams, with music conducted by Slovenia-born Daniela Candillari.