My Lovely Boy

S1, E2: Battery Sergeant-Major Williams and Gunner Parkins have identical photographs beside their beds. Could they both be of Edith, the Sergeant-Major's girl-friend in Colchester 20 years ago? Could Edith be young Parky's mum? Could Williams be his dad? And, when Solomons wants to kick the lad out of the concert party, Williams looks like having to post his only-begotten son ' up the jungle.'