The Sarah Jane Adventures - Season 2 Episode 10 -

Help comes from an unexpected source when Rani and Clyde discover that the Graske is an unwilling slave of the Trickster and, in return for their setting him free, he re-opens the time warp back to Foxgrove in the 1950s. Sarah Jane's parents come to realise her true identity but their deaths are inevitable if she is to grow up to be the person she is and to thwart the Trickster, so they repair the car and, having left the baby by the road, drive off to their fate. Their deaths however cause the Trickster to fade away and harmony is restored.