S4E1 - Wind Song
Ex Polaris submarine captain Edward Holt is in command of HMS Hero currently on duty in the Hong Kong area.
Jan. 4, 1977, midnight
S4E2 - Singapore Incident
An executive jet flying a routine trip to Singapore issues a mayday call and is forced to ditch at sea. Captain Holt and the crew of HMS Hero are ordered to investigate.
Jan. 11, 1977, midnight
S4E3 - Diplomatic Package
One of the islands in the vicinity of Hong Kong now has a large oil field, to which the UK would like favorable concessions. To show the British presence, HMS Hero drops anchor in the port and Captain Holt and his crew practice their diplomacy ashore.
Jan. 18, 1977, midnight
S4E4 - Rendezvous
Hero is asked to help the Hong Kong police catch wanted murderer Victor Chelten, a former businessman with mental issues who has escaped by boat.
Jan. 25, 1977, midnight
S4E5 - The Girl From The Sea
Whilst watching a naval helicopter exercise HMS Hero rescue a Chinese girl from the water. When they return to Hong Kong it is with the assistance of the police that the mystery starts to unravel.
Feb. 1, 1977, midnight
S4E6 - A Matter of History
HMS Hero is docked at Eddowes Island, which is about to be handed over from British rule. The locals are welcoming to the Hero's crew, but they're opposed to the handover, and some are resorting to violence. The Hero's crew are asked to help keep the locals in order, which worries Captain Holt, and Lt Napier in particular.
Feb. 8, 1977, midnight
S4E7 - Counter-Charge
HMS Hero is now on its way back from Hong Kong. As they move closer to Portsmouth harbour the ship's crew prepares for shore leave.
Feb. 15, 1977, midnight
S4E8 - Man In Reserve
HMS Hero's overworked pilot accidentally flies into the RNR manned HMS Rillington's firing exercise. He spends the next exercise on HMS Rillington while their irritating Lt Mannering inflicts his bragging on Hero. An emergency then occurs.
Feb. 22, 1977, midnight
S4E9 - Fall From Grace
Having returned from an exercise the HMS Hero crew are needled about the state of their ship by Captain Calder.
March 1, 1977, midnight
S4E10 - Jack Fell Down
The new officer on HMS Hero is a Special Duties commission: in this case, a former Petty Officer. He attacks his new role perhaps too vigorously and this is not helped by being unable to mix well and so learn from the other officers.
March 8, 1977, midnight
S4E11 - Robertson Crusoe
Whilst observing a Russian ship, HMS Hero finds and takes aboard an experimental unexploded mine.
March 15, 1977, midnight
S4E12 - Someone, Somewhere
As HMS Hero continues to steam home to Portsmouth, the RAF drop a post package for the crew. For Able Seaman Blane this starts unsettling rumours as to the state of his marriage back in his home village.
March 22, 1977, midnight
S4E13 - Operation Sting-Ray
After an uprising - in which five British citizens have died - Hero and Bulwark are deployed to Dubarr in order to pick up evacuees. Captain Holt's girlfriend, journalist Zoe Carter, is one of the people trapped in the country.
March 29, 1977, midnight