Survivors (1975) S1E03 "Gone Away"

Abby, Jenny and Greg drive to the nearest large supermarket to stock up on food. While there, they come up against some armed men who are working on Wormley's behalf. The men threaten to shoot them if they take the food and insist they sign up at the community. Abby refuses, and her group manages to overcome the men and escape. Arriving back at the church they find a tramp, Tom Price, has taken shelter at their house. He agrees to join them and help. He tells them of a young boy he encountered who Abby hopes may be her son. Abby, Greg, and Jenny go to find him but discover he is dead, but is not Abby's son. While away, Wormley's men have discovered their base and wait for their return. Tom agrees to join their settlement, and they begin trashing Abby's group's possessions. Abby, Jenny, and Greg return, but one of Wormley's men warns them not to enter the church, so the trio waits in the dark until the gang leaves. Fearing for their safety they leave the area the next day, with Abby vowing to continue searching for her son.