As Gandalf press the attack button to cast at Saruman. Dodge Saruman’s attacks until he gets tired, then lift and throw him at a lamp as indicated by the marker. Saruman will need to be thrown three times before he is defeated.
After the duel, or when swapping back to Frodo and Sam, smash the nearby LEGO objects and use the pieces to build the platform. Push the LEGO Boulder until it rolls off the platform and crashing into the tree, startling the Nazgul.
Proceed right as Sam and collect the LEGO Apple, throwing it at the bird in the tree above as indicated. The Nazgul will then move to the other side of the tree allowing Frodo and Sam to hide behind the tree. Form here pick up the LEGO Apple again and frighten the Nazgul by throwing it at the bird.
Head over to the LEGO Dig Spot and have Sam grow the large LEGO flower, to block the Nazgul’s view. Afterwards switch to Merry, move to the jetty and use the LEGO Fishing Spot. Press to correct buttons in time to catch a LEGO Crab.
Throw the LEGO Crab at the lantern that illuminates the bridge the Nazgul is on. The flames will cause him to ride off.
Cross the river and have Sam use the LEGO Dig Spot to uncover a stone. Throw it at the beehive and sneak through the felled tree. Once through, pick up the nearby stone and throw it at the bird as indicated