This episode was all buildup, but the season has given us a lot.

Helena broke into the group and was discovered.

Irving forced into retirement.

Burt, while still mysterious, being a Lumon lifer.

Mark reintegration.

Mark & Gemma’s relationship & her “death”.

Gemma’s life since death.

Cobel’s life in Lumon as the architect of Severing.

Sure there is still a lot of questions, but we’ve learned a lot about different characters this season.