The Flash
West House
Barry grew up with Iris in her house with Joe after his mother was killed. First seen in episode 1x03 “Things You Can't Outrun”. Iris sees two police officers attacked outside the house in episode 1x06 “The Flash Is Born”. Barry and Iris talk about Barry's loss and their relationship outside in episode 2x23 “The Race of His Life”.
Appears in 2 additional episodes.
Paradox
Barry finds Iris on the porch and asks if she really doesn't want to know about the other timeline.
The Present
Carolers arrive at the doorstep and Caitlin makes it snow.