S1·E7 Repairing the Clock Tower

After using all his energy while opening the tunnel to the Mountain Area, Kay collapses as he barely makes it there. Alf finds Kay in need of assistance but doesn't step up to help him. Following Kay into the tunnel, Selly and Duck finally reunite with Alf. While Duck brings injured Kay back to Kay's base, Selly learns that Alf was able to survive because his friends had made sacrifices.