"Three's a Crowd" is the eleventh episode of the fourth season of animated television series My Little Pony: Friendship Is Magic as well as the seventy-sixth overall. With Britt McKillip and John de Lancie guest starring as Princess Cadance and Discord, the episode follows Twilight Sparkle and the former, who visits from the Crystal Empire, trying to have a relaxing day. When they are interrupted by a sick Discord, they must venture to the edge of Equestria to prevent him from disrupting their visit. Co-directed by Jim Miller, with Jayson Thiessen as executive producer, and written by Meghan McCarthy, the episode aired on January 25, 2014, receiving over 400,000 viewers during its original broadcast. The episode received mixed to positive reviews from critics, who praised Discord. Plot Princess Cadance visits Ponyville to spend the day with Twilight, who anticipates quiet bonding time with her sister-in-law, while Fluttershy departs to see the Breezies. Twilight's friends promise to not let anything disrupt her and Cadance's time together as the last times they saw each other, the fate of Equestria hung in the balance. To their dismay, Discord shows up who appears to have come down sick with the "blue flu". Rainbow Dash escapes from the situation while Pinkie Pie is distracted by a balloon; Discord sneezes on Rarity and Applejack, making them sick too. After Twilight's friends become unavailable, Discord approaches Twilight and Cadance, the latter of whom creates a "magic health bubble" to prevent them from getting sick too. While Discord badgers them to take care of him while Fluttershy is away, his list of increasingly outlandish demands get on Twilight's nerves until he finally asks them to make a cure from a flower that grows at the edge of Equestria. Twilight and Cadance recover the flower and fight off a giant Tatzlwurm guarding it, only to find upon returning that Discord had faked his illness to test how far Twilight was willing to go for his well-being. Despite Twilight's anger at him for ruining her day with her sister-in-law, Cadance injects by pointing out that she actually enjoyed their adventure as a change of pace from her predictable life in the Crystal Empire. The Tatzlwurm suddenly reappears, and sneezes on Discord, Twilight and Cadance. While the latters are protected by the health bubble, the former actually falls sick and he is returned to Ponyville for Fluttershy's care. Twilight documents what