The final course in the ILGC series brings the student's four-year grand challenge journey to a close. This semester is centred on reflection, communication, and impact. Students will consolidate their project work into a comprehensive showcase: - documenting the full arc of their journey from initial observation to implemented or deployable solution, and articulating the social, technical, and personal dimensions of their learning. Beyond project completion, students are encouraged to reflect critically on what worked, what did not, and what they would do differently - developing the habit of structured retrospection that defines thoughtful engineering practice. The course also situates students' individual projects within the broader landscape of the SDGs and global grand challenges, helping them understand the systemic context of the problems they have engaged with. The semester culminates in a public exhibition where students present their work to faculty, peers, and external stakeholders, marking the completion of their ILGC journey.