The Flynn-Fletchers are in England visiting Lawrence's parents, Reginald and Winifred. During their trip, Phineas and Ferb decide to hold a medieval tournament after hearing their grandfather's story about the Black Knight of Worcestershire. Candace also participates in the festivities only to impress Charles. Agent P infiltrates EvilCon to see what Dr. Doofenshmirtz is up to. --- Phineas and Ferb build robot versions of themselves, Phinedroids and Ferbots, to help out with their Big Ideas. Meanwhile, Dr. Doofenshmirtz regrets all the messages he left on his girlfriend's answering machine.