Eddie Yeats was born in Liverpool on 22 August 1941. In adulthood, Eddie held low-paid jobs and made extra cash by helping out his disreputable friends with carrying out burglaries and selling stolen goods. In 1973, Eddie was caught by the police and sentenced to 18 months imprisonment. His cellmate at Walton Jail was Jed Stone.
When he was paroled and released from prison, Eddie arrived on the doorstep of Jed's former landlady Minnie Caldwell in Coronation Street, hoping she would give him a room before he had to go back to Walton. His friend Nobby Harris asked for his help to rob a supermarket, but Eddie wanted to stay clean and preferred to pursue barmaid Bet Lynch. During a date the police arrived to escort him back to prison. Eddie had told Bet he was on leave from the army, and she went off him.
After serving the remainder of his sentence, Eddie returned to the street and ingratiated himself with the neighbours, hoping someone would let him stay with them. He tried to fix a date with Bet again, but settled for friendship when he stopped her from taking an aspirin overdose when she found out her son, Martin Downs, whom she never knew, was dead.
Eddie went into partnership with Stan Ogden in his window cleaning business and was allowed to lodge with Minnie at Number 5 and later with builder Len Fairclough at Number 9, but in September 1975 he hid a suitcase containing the proceeds of a burglary carried out by his friend Monkey Gibbons, in Minnie's house, where it was found by the police. Eddie turned himself in and he was charged with dishonest handling of stolen goods, and sentenced to another year in prison.
Eddie returned to Coronation Street again when he was released from Walton in 1976. No one was happy to see him back, but he found lodgings at Number 13 for a few weeks when he got special wallpaper for Hilda Ogden's mural and helped her decorate. Eddie built a playground at the back of the Community Centre for the local children, helping out Ken Barlow. He was treated with mistrust by the children's parents because of his criminal history, and forcibly removed from the project despite Ken defending him.
After his brief stay with the Ogdens, Eddie lived at his ex-cellmate Monkey Gibbons's house. Stan and Hilda began to regard Eddie as the son they never had. In 1977, he started a short-lived curtain-making business with Hilda, but this was cut short when Mike Baldwin would not let Hilda use his factory. Eddie regularly tried to sell products to his neighbours, insisting nothing was stolen or faulty, but more often than not there was a problem of some sort. He sold Rovers Return landlady Annie Walker a carpet with her initials on it. The initials were the same because the carpet came from the Alhambra Weatherfield Bingo Hall. His promise to get a colour television for the Ogdens was similarly unsuccessful as he only managed to get them a colour tinted screen.
In 1978, Eddie was suspected by the police of stealing Stan's handcart and filling it with lead stolen from Farraday Street, even though it had actually been lent to Eddie's friend Tiny Hargreaves. The cart was impounded by the police when Hilda saw Tiny and took it back, and Eddie and Stan claimed it was stolen. But the police found Eddie's fingerprints on the cart and Stan discredited Eddie's alibi by claiming not to know him. Eddie forgave Stan when he told the police the truth, but to clear themselves they had to admit who the real culprit was and Eddie hated the thought of shopping his friends to the police.
Eddie started working for Len Fairclough in 1979, fixing roofs. In April, he took possession of 6 hens, and made a coop for them in Number 13's garden. He convinced Hilda to keep them by promising they would bring the Ogdens money. However, when the Ogdens were ridiculed for their ownership of the hens, Hilda made Eddie cook them for food.
Eddie found himself facing prison again when he entertained his friend Herbie Cook at Betty Turpin's house, where Eddie was insulating Betty's loft. When Herbie stole a clock, suspicion fell on Eddie, who had a key to Betty's house due to the job he had been given. Herbie would not admit to having taken the clock, but Eddie convinced Betty not to tell the police.
In 1980, now nearly 40 years old, Eddie was keen to settle down and marry, firstly dating Lorna Ferguson then Pat Marshall. Eddie began experiencing difficulties at this time. He lost his job at the builder's yard when Len took on teenage apprentice Martin Cheveski and sacked Eddie because there was not enough work for two employees. Eddie considered starting his own business, but his neighbours ridiculed the idea, so he took a job as a binman. The Ogdens let him live at Number 13 again after hearing he was earning a reasonable wage.
On one shift, Eddie discovered a half-full can of hair dye in the Rovers' bins, belonging to landlady Annie Walker, and returned it to Annie, believing she had discarded it by accident. Annie was angry and embarrassed and forbade Eddie to touch her bins again, going as far as to ask the council for new bin men. Eddie told Annie that his men were boycotting the Rovers, which made him unpopular again as the smell permeated the pub. The situation was not resolved until Annie apologized to him.
In 1982 Eddie met Marion Willis after talking to her on CB radio, calling himself "Slim Jim". To impress Marion, who referred to herself as "Stardust Lil", Eddie told her over the radio that he was a businessman, and was not expecting to meet her, so when the situation arose, he borrowed the key to Mike Baldwin's flat from Hilda, who worked for Mike as housekeeper, and told Marion the flat was his. Hilda found out before Mike did, but Eddie, who was unsure of how to tell Marion the truth, had copied the keys and started meeting Marion there regularly. Mike discovered this when he found post and phone messages for Eddie, but he let Eddie meet Marion there one last time to tell her the truth. To Eddie's relief, the truth made Marion even more attracted to him, as she had been having doubts that they were right for each other due to his supposed wealth.
When he realised he was in love with her, Eddie told Marion about his time in prison, and when she accepted it he proposed to her. They got engaged but Marion wanted to wait for a while before marrying. After a few months, Marion's ex-boyfriend Phil Moss turned up to try to win her back. Thinking he might not be good enough for Marion, and feeling jealous, Eddie told her their engagement was off. Marion left but returned to tell Eddie that she did not love Phil any more and wanted him. After getting back together with Marion, Eddie intended to raise money to buy a house for them and invested £1000 in Elsie Tanner's boyfriend Geoff Siddall's car business. When it transpired that Eddie had been conned and Geoff had fled with his money, Marion left Eddie and told him to stay away from her. Eddie did not take the rejection well and disappeared and was eventually tracked down to his native Liverpool. When Marion followed Eddie there, they got back together again, and their engagement was back on.
In 1983, Marion discovered that she was pregnant, and they brought forward the date of the wedding. Eddie took an instant dislike to Marion's mother, Winifred Willis, as she constantly complained about Eddie and wanted Marion to live in Bury with her. At his stag night, Eddie got a black eye when he tried to stop Fred Gee from announcing Marion's pregnancy to the entire pub. Eddie's colleague Curly Watts was the best man and Hilda stood in for his mother as he married Marion at All Saint's church. After the wedding, Winifred decided that she did like Eddie after all.
The Yeats' returned from their honeymoon to the news that Winifred had had a stroke and was seriously ill. Eddie was thinking about buying a new house, but Marion persuaded him to move to Bury so that she could give her mother full-time care. Eddie got a transfer on the bins and the couple left Weatherfield to start a new life in Bury, with Eddie telling the Ogdens that they had been like parents to him.
The following year, Eddie's daughter Dawn Yeats was born, and Eddie phoned Hilda to ask her to tell everybody at the Rovers.
In November 1987, Eddie returned to Weatherfield to visit Hilda after she had been attacked and injured in a burglary. This was his final appearance to date.