Joe's future in the army hangs in the balance. Armstrong fears for Y..
The NLF demand a swap. Alison watches over Ed, conflicted about thei..
The RMP begin their desperate search. Tilbrook takes Markham to visi..
Captain Joe Martin meets with American journalist Martha Franklin to..
Led by Major Harry Markham, the Royal Military Police assist special..
Captain Joe Martin arrives in Aden with his wife Honor to replace th..