You would hardly expect a hospital to encourage its patients to suffer enormous pain but one in Japan does. It is their way of getting the crippled back on to their feet. Mrs Shinsho and Mrs Ise are confined to wheelchairs with rheumatoid arthritis. Q.E.D. watches their gritty determination over four months as they struggle to walk - even run. With only blasts of deep-frozen air as a temporary anaesthetic, they are made to force their stiffened joints back into action, 12 hours a day, at this remarkable Japanese treatment centre.