so Bellamy's managed to kidnap Murphy, and he, Ren, Roy and Lexa will be using Murphy to get into the Volary. their goal will be to plant a bomb, much like the one in the Quarry. Ren and Roy will be leading the charge on making it, and Murphy will be helping them get in/through the compound unobstructed. this bomb doesn't have to do a ton of damage or hurt anyone. the real purpose of it will be to cause some chaos at the same time the Quarry bomb goes off so that attention is split and the Kestrels can get the Quarry participants out more easily. Bellamy specifically has no qualms about getting caught, and can stay behind to detonate it/take the blame if need be.