Molly arrives home from school alone and later she gets worried and calls Gert in episode 1x01 "Reunion". Several years ago, the Yorkes family hosts a wake for Molly's parents after their untimely deaths in episode 1x03 "Destiny". Stacey and Dale prepare to head out to search for their missing dinosaur and later Molly hears a noise outside her room and is attacked by said dinosaur when she investigates in episode 1x04 "Fifteen". Appears in 1 more episode.
Source: MCU Location Scout