Taxi driver John Worboys has appeared in court accused of drugging four women in a bid to carry out sex attacks.
The 62-year-old is said to have told his alleged victims he had won money gambling after picking them up in his taxi between 2000 and 2008 in London.
Prosecutors say he offered them alcoholic drinks, such as champagne, which were laced with a sedative.
He appeared at Westminster Magistrates' Court by video-link from Wakefield prison on Thursday.
Grey-haired Worboys, wearing a grey shirt and glasses, gave his name as John Derek Radford before confirming his date of birth, his nationality as British and that he currently resides in HMP Wakefield.
He sat listening intently to proceedings and making notes as prosecutor Jonathan Polnay outlined the charges against him.
Worboys faces two counts of administering a stupefying or overpowering drug with intent to commit rape or indecent assault under the Offences Against the Person Act, and two of administering a substance with intent to commit a sexual offence under the Sexual Offences Act.
He did not indicate pleas to the charges, which relate to four women, none of whom can be identified for legal reasons, who made allegations to police in early 2018.
The first alleged victim was allegedly picked up in Worboys' taxi after leaving a bar.
He is said to have told her he had won money on the horses and that he had been a stripper before offering her an alcoholic drink laced with drugs in a plastic cup.
Worboys is said to have used similar tactics to drug the other women.
District Judge Michael Snow sent the case to the Old Bailey, where Worboys is next expected to appear by video-link on June 20.
He told Worboys: "At that hearing, the judge will require you to enter your pleas of guilty or not guilty to those charges."