Jim (Home Fires)

From Tardis Wiki, the free Doctor Who reference

Jim was the husband of Lucy and the brother-in-law of Sarah. He and Lucy had at least two children. They lived in Australia.

One Christmas, their house was threatened by wildfires. Sarah's ex-husband, having been burned out of his own home, came to stay with them. The Sixth Doctor enlisted the ex-husband's and the family's help to save Jim and Lucy's home from the fires. (PROSE: Home Fires)