Wing Commander Marsh assists the British doctor as an orderly and he proposes escaping by feigning mental illness in order to be repatriated. The escape committee is not told of the plan and Marsh starts acting irrationally – however, the ever suspicious Ullmann appoints Private Hartwig to watch Marsh. Hartwig has a mentally disturbed brother and knows exactly what to look for. Will the wing commander be able to live the part and convince him?

Dick Player believes he has an excellent escape plan, but the escape officer rejects the idea and the feeling is that there are too many good escape ideas being rejected which results in an impromptu escape by Simon which coincides with an inspection visit – however, Simon learns some valuable information and the original escape looks as if it's back on – but Colonel Preston lays down certain surprising conditions.