Timeslip is a British children's science fiction television series made by ATV for the ITV network and broadcast between 1970 and 1971. The series centres on two children, Simon Randall (Spencer Banks) and Liz Skinner (Cheryl Burfield) who discover the existence of a strange anomaly, known as the "Time Barrier", that enables them to travel in time to different historical periods in alternate pasts and futures.