TV Guide GREAT! tv Wednesday

A hard-line disciplinarian colonel drops in on the 4077th during an outbreak of practical jokes to mark April Fool's Day, and a veneer of normality is only established through Potter's extreme measures. Alan Alda stars

Suspecting she is in trouble, Mike flies to Brussels to find Laura. Meanwhile, Helen and Phil are beside themselves with frustration at her apparent insensitivity. Comedy, starring Judi Dench and Michael Williams

Adam and Mary take a trip to the city to collect an award he has won, but their journey proves eventful for all the wrong reasons when their coach overturns. Mary must deliver the baby of a pregnant fellow passenger, while Adam remains trapped under the wreckage. Drama, starring Melissa Sue Anderson

Nels becomes apprehensive when he learns that a travelling circus, in which his estranged sister Annabelle is one of the stars, is coming to Walnut Grove. Drama, starring Richard Bull

Mrs Oleson is shocked to discover a woman has spent the night in the Rev Alden's room and wastes no time in setting out to have him expelled from the Church

Hamish investigates when unpopular, meddling newcomer to the town Vicky Jeffreys receives anonymous threats after taking over the planning for Lochdubh Day. Starring Robert Carlyle and Phyllida Law

Highland medic Dr Finlay begins to suspect the Reverend Gill may be more interested in the pleasures of this world than the rewards of the next, and sets out to investigate. Meanwhile, his colleague Dr Napier delivers glad tidings to a married woman - but does not receive the joyful response he anticipated. Rural drama, with David Rintoul and Jessica Turner

A North Korean soldier forces Hawkeye to perform emergency roadside surgery on his friend. Korean War comedy, starring Alan Alda, David Ogden Stiers and Mike Farrell

Members of the 4077th share their impressions of warfare in letters to be sent home to schoolchildren. Korean War comedy, starring Alan Alda, David Ogden Stiers, Mike Farrell and Loretta Swit

A jilted Italian soldier falls for Hot Lips, and Klinger creates a cement floor for the operating room in a bid to fight the spread of germs. Korean War comedy, starring Alan Alda, Mike Farrell and Loretta Swit

Laura decides it is time to move from younger sister Helen and inlaw Phil's home and goes to Mike's apartment to retrieve the things she left. However, she is shocked to find his scantily clad new girlfriend in residence. Comedy, starring Judi Dench