Alfonso dances through the pain in stunning 'DWTS' semi-finals

Dancing With The Stars is rocketing towards its final episodes, and the competition has never been hotter as the show's best couples performed some of their most impressive dances on tonight's jaw-dropping episode.

The big story going into this week was Alfonso's back injury, which he suffered during rehearsals earlier this week. Everyone tuned in to see how it would affect his performance, but it seemed to only make him stronger and more determined.

VIDEO: Alfonso Ribeiro Injured During 'DWTS' Rehearsal

The night was filled with laughs, inspiring routines, and elegance, but not without some missteps. Let's check out the best, the worst and the weirdest moments of the evening...

THE BEST

Bethany and Derek's Adorable RomCom Dance

Bethany Mota and Derek Hough have been nailing their dances week after week, and this episode was no exception. However, they upped their game with a fun, romantic story to frame their dance. Derek had to steal Bethany away from another suitor, and the way the three dancers incorporated a park bench into their routine was often mindboggling.

Janel and Val Are Just So Damn Amazing

Janel Parrish and Val Chmerkovskiy danced with the kind of fervent intensity and fiery passion that you rarely see in any DWTS performance. Often, between these two, it can be hard to tell who is the pro and who's the star. Although it's never hard to tell that Val and Janel are head-over-heels in love.

VIDEO: Janel Parrish Wants to Kill Val In Her 'Pretty Little Liars' Dance!

Their second dance of the night was slower, but no less passionate, with a gorgeous number that saw Val spinning Janel like a top around his neck and through the air. It almost felt like two humans couldn't possibly dance like this without CGI or Kung Fu action scene wires.

Bethany and Derek Are 'Picture Perfect'

"This dance should be on permanent display in an art gallery. It's a modern masterpiece," and, "It's a Picasso of a dance," are just two of the glowing judges' comments about Bethany and Derek's impossibly elegant and beautiful dance involving a white painting frame. It also secured them a perfect 40.

Alfonso Proves His Dedication

In the final song of the night, Alfonso Ribeiro and Witney Carson performed a dream-themed dance -- featuring pajama-like costumes -- and aside from the passion and drama of the routine, the really impressive parts came when Alfonso -- suffering from major, painful back trauma -- still managed several gorgeous lifts in which he carried Whitney across the floor. Dancing through the pain gave his performance a complexity and depth he hasn't shown so far this season.

VIDEO: Alfonso Ribeiro Reveals His Wife Is Expecting On 'Dancing with the Stars'

THE WORST

That Moment You Realized Tommy's Only On The Show To Touch Peta

Perhaps this was obvious long before this episode –- like when Tommy's trio dance was basically airplane-based sexual harassment set to music –- but it sure feels like Tommy takes every chance to sit down and let his pro partner Peta Murgatroyd crawl all over him before he smacks her butt. People seem to love it though.

Alfonso Dances Through The Pain

The reason this makes it to the Worst category is because it's just so sad to see Alfonso in pain. He hurt his back in rehearsals, and came close to having to drop out of the competition. Seeing his determination was inspiring. Seeing him cry in pain during the judge's feedback just sucked.

THE WEIRDEST

Julianne Hough's Fantasy Princess Getup

Julianne has made some interesting wardrobe choices in the past, but this one's just perplexing. No one's saying she doesn't look pretty. She just looks like she belongs in a Grimm Bros. fairy tale as a magical princess or a brave, adventurous Bavarian village girl.

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DWTS Cast Jam Session

Apparently, when the cast of DWTS aren't rehearsing, they are jamming together on guitars and bongos like a circle of groupies playing in the parking lot outside a Grateful Dead concert in the late 70s.

Peta As A Clockwork Snow Globe Robot

ABC

With a haunting (somewhat creepy) version of "Tainted Love" underscoring their strangely beautiful dance, Tommy plays a snow globe maker while Peta plays a clockwork doll inside one of his snow globes. The dance actually brought a few of the judges to tears. And... It might have also been Tommy's best dance, which is weird in its own right.

FINAL SCORES

Janel Parrish and Val Chmerkovskiy – 78 (40/38)
Bethany Mota and Derek Hough - 76 (36/40)
Alfonso Ribeiro and Witney Carson – 75 (36/39)
Sadie Robertson and Mark Ballas – 74(37/37)
Tommy Chong and Peta Murgatroyd - 64 (28/32)

ELIMINATIONS (*CAUTION: SPOILERS*)

After Alfonso, Janel and Bethany were declared safe, it all came down to Sadie and Tommy, who were both in the lowest two of the week.

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However, despite delivering some of his best dances of the season this week, Tommy and his stunningly talented partner Peta got the axe. While some might argue it should have come weeks ago, it was still fun seeing Tommy make it this far, and it's sad – but only reasonable – to see him go home.

Now, the competition is as close as it could be with four of the most talented and entertaining couples in DWTS history going head to head in the finals next week.