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Blue Watch seems to be thriving under station officer Mick Callahan. Recall plans his retirement, but there is something the he has kept a secret.

The Watch mourn Recall's death and an internal inquiry is launched. Elaine decides to go through with the plans that she and Recall had but has fears for Adam's future.

A new recruit arrives and Mooney begins his bid for leadership. Mick finds himself increasingly torn between his lover for his wife and family and his feelings for Sally.

Mooney steps up his efforts to be the Watch's true leader, while new recruit Craig is eager to be tested on the fire ground, on attending his first fire though he is terrified.

Mick confesses to Adam that he knew about Recall's illness and confronts Sally with the claim that she slept with Mooney. Shauna's mood swings become more extreme.

On a family trip to Southend the Watch makes an unusaual discovery and relationships between Mick, Shauna, Mooney and Sally come to a head

At a boxing match between the Brigade and the Met, Adam is trapped into confirming DI Roebuck's suspicions about who torched his car. Mooney opens his heart to Sally.

A redundant satellite is falling to Earth and south-east England lies in the path of it's trajectory. With emergency services on standby everyone has personal decisions to make...