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Cast for season 15, episode 50 "Critical Mass"

Monroe is sceptical but cautious when a young woman rings Sun Hill and says she thinks her boyfriend, Ben Wallace, may have hidden a bomb in the station. As the relief begin to conduct a search, Carver finds a suspect device hidden in the ceiling of one of the interview rooms, and the bomb squad are called in to assist. As Monroe leads a full evacuation of the station, he and Conway watch from a nearby van as the elite bomb squad officer attempts to defuse the device. The bomb is eventually rendered useless, but the officer is confused as to why there were a number of dead wires loose inside when the bomb was constructed so well - until he realises there could be another bomb elsewhere.

Nicholas Day guest stars.

Season 15 index | <<< S15E49 "Inside Out" | S15E51 "Ring-a-Ring O'Roses" >>>