is attack on titan (shingeki no kyojin) episode 68 filler?

Three years ago, a Marleyan ship approached Paradis Island and sent a team ashore. After not hearing from them for two hours, the captain prepares to send two additional teams, but before he can the Attack Titan lifts his ship into the air and carries it ashore.

Hange Zoë then welcomes the Marleyan soldiers to Paradis, saying they are already friends with one of the soldiers who arrived as part of the earlier team. Nicolo is terrified, however, and does not play along, shouting for his captain to go ahead and shoot.