TV highlights: 'Under the Dome' returns for Season 2 on CBS

Continuing its European tour, "The Bachelorette" (ABC at 8 p.m.) is in Brussels, where one bachelor reveals his past, another attends a concert during his one-on-one and the other four go on a bike ride with Andi to the ruins of a castle. Following an elimination, the final four bachelors are revealed.