Covenant-Kara, a beautiful superpowered girl from Krypton, entices Clark to join with his father and embrace his destiny. Clark is left without support after Pete's departure when Jonathan reveals the deal he made with Jor-El. At the same time, Clark's relationships with Lex and Lana take unexpected turns, leaving him with no one but Kara to turn to.
A strong finale that feels more like a huge build up to the last 10 mintues, then rapping up all the storylines of the season. The introduction of Kara Zor-El aka Supergirl was a real treat and Adrianne Palicki (Kara/Lindsey Harrison) has great presence even undeniable wonder she brings to the character. It's actually a real shame when Kara turns out not to be the iconic hero but Jor-El's lastest scheme of luring his son back to his destiny. Looking back on it, this version of Kara seems a lot more interesting and better portrayed than the real Kara who appears 4 seasons later (Sorry, Laura Vandarvoort!). I especially loved the display of Kara's powers, like how she flips the car over in the teaser and when she shoots some powerful energy out of her hands and kills that FBI agent in the car.
The tension surrounding Lionel's trial and jail sentence is played out well, especially how it effects everyone's safety. The most interesting development is how Lionel gives Clark the key to Lex's secret room in the mansion. It's a excellent development that Lionel use this as an opportunity to break Clark and Lex up. You actually feel bad that Clark and Lex might finally have a rift in their friendship but Lex's obsession is quite disturbing at the same time. Other great developments are when Kara reminds Jonathan about his deal with Jor-El and finding out it was an exchange for Clark to return to Jor-El one day. I was also impressed by Lana's depature scene as Clark disappears and leaves a white rose for her on the ground. It also saves from more mushy, fussy Clana dialogue.
The cliffhangers of the episode really make this episode as the last 5 minutes are the most epic and shocking moments of the series. First, Chloe and her father are escorted into a saftey house only for it to explode seconds later. Then, Lex's drink turns out to be poision and he collapses to the ground in his mansion. Lastly, a kryptonian symbol appears on the Kent farm in a large fire. It's a truly powerful sequence which encorporates a really moving opera piece and the sight of Lionel getting his head shaved then smiling at the end is just so incredibly evil as he seems to win despite his defeat. Not to mention, the sight of Clark floating away naked into a black hole of nothingness leaves a dark tone as you wonder what Jor-El will do with him and what has happened to Jonathan who is now unconscious. "Covenant" isn't the biggest finale, but it's one of the most ambitious, with shocking cliffhangers and amazing developments that make it another highlight of Smallville's finest season to date!