Ranked #21 of 21 in Season 4•−0.8 vs season avg
The headmaster's "Clean Up Fenn Street" campaign is in full swing. But when Potter takes on some temporary assistance, an explosive situation develops which threatens to clean up Fenn Street for good.
Richard Davies
Mr. Price
Erik Chitty
Mr. Smith
Joan Sanderson
Doris Ewell
Deryck Guyler
Norman Potter
Noel Howlett
Mr. Cromwell
Bob Larbey
Writer
John Esmonde
Writer
Howard Ross
Director
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"What Are You Incinerating?" is episode 15 of Please Sir! season 4. It scored 5.0/10 from 15 votes, ranking #21 of 21 episodes this season (season average 5.8). Directed by Howard Ross and written by Bob Larbey, John Esmonde, it aired on January 2, 1972.