How many movies have Derek Lee Thompson and Thomas Brodie-Sangster collaborated on?

They have worked on 2 movies together! Their first movie together was Phineas and Ferb: Mission Marvel (2013) while their highest rated movie together was Phineas and Ferb: Night of the Living Pharmacists (2014). They have not worked together since Phineas and Ferb: Night of the Living Pharmacists (2014).