"It's been another incredibly emotional week here in Bachelor Nation, and to say that next week is going to really blow you away would be a massive understatement," Harrison wrote in his Yahoo! TV blog.
Harrison declined to reveal why exactly next week will be mind blowing, but the comment is enough to put Bachelor Nation on the edge of its seat.
"We only had one hour this week to show you what went down between [Andi Dorfman]'s surprise appearance, the Rose Ceremony [when Corinne Olympios went home], and the beginning of the overnight dates in Finland -- so next week is going to be a full three hours," Harrison said.
Viewers saw Nick Viall offer Raven Gates an invitation to the fantasy suite in Inari Saariselka, which she gladly accepted hoping to have sex -- and an orgasm for the first time -- with the man she loves and can see a future with.
"We haven't been to a cold destination for a finale in five years, and Finland, especially Finnish Lapland, was somewhere we were all very excited to go... It was also very cold, and very quiet. The sun didn't really rise until about 10AM, and it started setting at 3PM," Harrison revealed.
"This, obviously meant longer nights, and longer overnights, which is great -- because at this point, Nick needs every moment he can get with these women to find out what to do next. We saw Raven's VERY interesting date, and we'll hear more about that next week, followed by Rachel and Vanessa's dates."
Harrison added, "We'll take one more step toward the finale, and also take a step into the past, as 19 women come back for The Women Tell All."
Olympios, a 24-year-old Miami native, is probably the one bachelorette fans are especially looking forward to seeing on Season 21's The Women Tell All special.
"Corinne had an amazing journey on this season. First she was the one that everyone loved to hate, but all season long she was the one that everyone talked about," Harrison noted.
"I think Corinne is multifaceted and truly an interesting young woman. She's funny, she's sassy, and she's unapologetic. We will miss her. But you won't have to wait for long... next week [we'll] see [Olympios and her rival Taylor Nolan] and Nick for the first time since the two-on-one date in the [New Orleans] swamp."