Boro fans are waving goodbye to the Sky Bet Championship this summer after seven years in the second tier of English football.
Nine months of hard work resulted in absolute elation when thousands of Teessiders celebrated promotion with their heroes after the 1-1 draw with Brighton sent Boro up.
We're taking a look back at some of the key moments of the 2015/16 season that defined our promotion back to the Premier League, and here's part five of our series...
Late drama sends Boro top of the Championship
A game in hand and a chance to dig our heels into the top two of the Championship promotion positions was on offer against Reading at the Riverside.
It was all going to plan after Emilio Nsue's opener on 10 minutes, but a Simon Cox goal had hearts racing as Boro searched for the all-important winner.
Matej Vydra spurned a glorious chance to win it for the visitors and it wasn't long before Boro went up the other end and stole it in the dying embers.
A ball in from a corner rattled around inside the box and it eventually fell to Adam Forshaw who squeezed it home with seconds to spare. A truly incredible moment.
Rhodes double sees Teessiders fight back
Just four days on from the Reading game and an already relegated team up went up against one desperately chasing a place back in the Premier League - what could go wrong?
Over 4,300 Teessiders packed out the away end and it very nearly did go wrong for Boro as Josh Vela opened the scoring for Bolton after the hour mark.
Another big reaction was needed and the fans played their part as Jordan Rhodes saved the day with an incredible double to win it for Boro on 90 minutes.
Job done at the Riverside
The stage was set. Second v third, level on points and just two goals separating the two sides.
Brighton knew their task - a win and they were up, whereas Boro knew a draw would secure a place back in the Premier League.
Chris Hughton's Seagulls walked out to a mammoth atmosphere at the Riverside and the Teesside support were not going to let this one slip away.
Stuani opened the scoring on 19 minutes to give Brighton what would ultimately be the impossible task of beating Boro at home.
Dale Stephens did pull one back but Brighton couldn't find a second and it was party time on Teesside as Mike Dean blew the final whistle.