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Laura has left CBS: according to Rocky this is because she felt that Harry was taking her for granted. Charlie Hardiman is having to answer the phone and act as secretary. Harry is desperate to find a permanent replacement but all the girls that he has interviewed so far are proving to be singularly useless. Robert MacGuffin, a hardware designer who works for a computer company, Pictel, believes that his former secretary, Alexandra Wilton, is stealing the design for the company's latest transputer. He wants Ken and Harry to watch her. He suspects her of industrial espionage because she has just resigned for no apparent reason (or so he says) and she already has a prison record for cheque fraud. Ken and Rocky set up their cameras and binoculars in a disused warehouse opposite the studio flat where she lives. Rocky follows Alex to the ice rink where she meets her boyfriend, Jim Parham. When Ken sees a middle-aged man arrive at Alex's flat and offer her a cheque which she refuses, he trie

At a Rotary Club dinner, Harry meets Joe Green, a local businessman. Joe is at the centre of a hate campaign: his car has been repeatedly sabotaged, he has received a newspaper cutting about himself with a red dagger drawn across it and someone pretending to be his secretary has cancelled the caterers at a Chamber of Commerce dinner that he was organising. He suspects that someone is trying to prevent him going ahead with a business deal to buy a restaurant, ""Maximillians"" in Derby. He asks Harry to investigate. He also wants Harry to invest in the restaurant deal, along with another businessman, Charles Hastings, and promises him a seat in the Star Chamber if this deal goes ahead. Harry persuades Ken to act as Joe's bodyguard. At Joe's house, Ken meets Joe's wife Sheila who seems unexpectedly worried that Joe has engaged a bodyguard. Joe is extremely arrogant and peremptory to Ken, treats him like dirt and can't even be bothered to get his first name right. Ken takes an instant dislik

Mrs Van Bueren, a middle-aged widow, arrives home to find that she has been burgled. Fortunately the thieves have not taken her jewels. She enlists Ken's help to guard them. Ken takes away the jewellery box, full of tiaras and necklaces, to store it in CBS' safe. Meanwhile, Mr Fraser, a rep from a security firm, is showing Harry his company's products - a mugger-proof briefcase and a safe alar. Harry is not impressed and sends Fraser away with a flea in his ear... but not before he has seen Mrs Van Bueren's jewellery. Rocky is behaving very strangely: his heart isn't in his work any more and he hasn't turned up for work. He has started wearing aftershave and he has bought a clapped-out Ford Capri with a musical horn and a noisy exhaust. All this is because he has fallen madly in love with Melanie King, a demure cashier at his bank. Harry has noticed that Rocky isn't really concentrating and is ""on another planet"", so he gives him an easy job: guarding a sculpture exhibition consisting

Protecting a woman from her nuisance husband appears to be a straightforward assignment until strange things begin to happen.

Ken is on the brink of quitting the security business after dealing with a messy adultery case, so Harry sends him to a rural retreat run by his nephew — where life is anything but relaxing.

Ken investigates the case of a larger-than-life businessman who is accused of kidnapping a young child.

While Ken helps the traders, Harry and Alex try to win a big security contract and find themselves at odds with their partner.

Ken has a spine-chilling confrontation with the supernatural when he is called in to guard expensive antique fittings in an eerie manor.

Rocky and Alex are planning a surprise birthday party for Ken. To get him out of the way, Harry pretends that he is being harassed and needs a minder for a weekend trip — not realizing that he really is in danger.

Ken gets emotionally involved with a wealthy woman - a 65-year-old pools winner.

Ken and Harry's close and loyal relationship comes under severe strain when Harry is arrested on suspicion of fraud.

Boon's ""Girl Friday"" Alex is in love with a man who has just been released from prison. Will he slip back into crime?

Harry falls hopelessly in love with a woman he meets at a fair, but his boasting lands him in hot water.