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|Country of origin||United Kingdom|
|No. of episodes||6|
|Original release||7 November –|
12 December 1987
Series 4 marks the last regular appearance of Sam Kelly as Captain Hans Geering; though he returned for a one-off special appearance in series 7. Francesca Gonshaw left at the end of the third series; though the exit of her character, Maria, is not explained until the second episode of this series. This series also sees the first appearances of Sue Hodge as Mimi Labonq in the third episode, as the new café waitress; and in the same episode Gavin Richards as Captain Alberto Bertorelli, the seconded Italian captain.
The following episode names are the ones found on the British R2 DVDs with alternate region titles given below them.
|Series No.||Episode No.||Episode title||Original UK airdate|
|4.01||22||Prisoners of War||7 November 1987|
|4.02||23||Camp Dance||14 November 1987|
|4.03||24||Good Staff Are Hard to Find||21 November 1987|
|4.04||25||The Flying Nun||28 November 1987|
|4.05||26||The Sausages in the Trousers||5 December 1987|
|4.06||27||The Jet-Propelled Mother-In-Law||12 December 1987|
|Title||Directed by||Written by||Original air date|
|22||1||"Prisoners of War"||David Croft & Martin Dennis||Jeremy Lloyd & David Croft||7 November 1987|
The cafe staff, Michelle, Von Strohm and Geering are trapped in the prisoner-of-war camp. The Gestapo try to tunnel in, Helga and Gruber try to sneak into the camp to rescue their friends, while the inmates are planning their own escape.
|23||2||"Camp Dance"||David Croft & Martin Dennis||Jeremy Lloyd & David Croft||14 November 1987|
The cafe staff, the Germans, and Michelle manage to escape thanks to the combined diversionary tactics of the camp entertainments and Gruber's refuse truck - but they find they have a couple of stowaways. Maria is not with them, having tried to escape through the post as a Red Cross parcel, but has been sent back to Switzerland due to insufficient postage. Captain Geering, having escaped over the wall, eventually manages to send a radio message - from London.
|24||3||"Good Staff Are Hard to Find"||David Croft & Martin Dennis||Jeremy Lloyd & David Croft||21 November 1987|
Captain Geering is replaced by the Italian Captain Bertorelli. Maria is replaced, not by one of the many nubile young applicants for the post René favours, nor by the very elderly woman applicant Edith and Yvette favour, but by Mimi Labonq, a Resistance fighter and former gang leader, under Michelle's orders.
|25||4||"The Flying Nun"||David Croft & Martin Dennis||Jeremy Lloyd & David Croft||28 November 1987|
|Herr Flick decides to bug the Colonel's office - with a daffodil. The Resistance must take action as their radio signal is being jammed by the Gestapo, which leads to Mimi hanging off the line of a kite while disguised as a nun.|
|26||5||"The Sausages in the Trousers"||David Croft||Jeremy Lloyd & David Croft||5 December 1987|
Without batteries to power the radio in the attic bedroom, René and Yvette must provide pedal power attached to a generator. René amasses a collection of sausages - some real, one containing a forged painting, and some containing explosives.
|27||6||"The Jet-Propelled Mother-In-Law"||David Croft & Martin Dennis||Jeremy Lloyd & David Croft||12 December 1987|
|General Von Klinkerhoffen has commandeered Monsieur Alfonse's vineyard and the locals are ordered to harvest the grapes. The RAF has dropped a spy camera, which has landed in the vineyard. The Resistance decide that the harvesting is the ideal opportunity to rescue the camera, and to assassinate the General.|