Martin Radley makes a comment about the false name he used when he rang Barbara Everton and links it to the poem "Enoch Arden". This is a poem published in 1864 by Alfred Lord Tennyson, the Poet Laureate at the time. The poem is about a man who goes to sea to earn money to support his wife and family and returns after ten years to find his wife is remarried with a new child.
Erik Chitty plays the ballistics expert and is referred to as 'Smithy'. In Please Sir, nearly 20 years later he plays a teacher called Smith and is known as 'Smithy'.
In the opening credits - "Based on the play "Second Chance" by Ella Adkins".
Bonar Colleano receives 'and A Guest Appearance of' credit.