“The Growing Summer,” on the ITV network, tomorrow (8.15) features Wendy Hiller. “The Growing Summer,” a novel for children by Noel Streatfeild, has been dramatised for television by Eric Thompson. The story, in seven episodes, is the second series presented in London Weekend Television's “Heyday Theatre". The series has been filmed in colour on location at Bantry Bay, Southern Ireland, which was Miss Streatfeild’s original setting for her book. “The Growing Summer” is a story about four children who have been sent to stay with eccentric Great Aunt Dymphna, while their parents are abroad. They are joined by the mysterious Stephan (played by Louis Selwyn). The story tells how the children's personalities are developed under the guidance of their Great Aunt, a whimsical, almost magical old lady, played by Wendy Hiller. The children are played by Hoagy Davies (Alex), Zuleika Robson (Penny), Mark Ward (Robin), and Laura Hartong (Naomi).