What is the last episode released in season 2?

The last released episode from season 2 is 2x17 "Carrnal Knowlegde". The following episodes are:
March 16(2x18), "Age of Dissonance" - Carter Baizen returns
March 23(2x19), "The Grandfather" - Nate's grandfather makes his first appearance in this show
March 30(2x20), "Remains of the J." - Poppy Lifton returns and Armie Hammer makes his first appearance in the role of Gabriel Serrano
April 20(2x21), "Seder Anything" - Cyrus Rose returns
April 27(2x22), "Loose Ends" - Georgina Sparks returns
May 4(2x23), /no name/ - Lilly and Rufus' love child makes his appearance for the first time
May 11(2x24), /no name/ - introduction of the spinoff, No Doubt will perform on the prom night for the first time after 5 years
May 18(2x25), /no name/ - season 2 concludes.

*I hope I answered to your question :)

Episode 2x25 I believe. =)

2X17 - Carrnal Knowledge

the last one we saw was Carnal knowledge 2.17, is seems there are going to be 25 episodes, we don't know the name

Episode #2.25

i tink episode 17 is the last released but i no there are more coming out =]

The last episode in season 2 is going to be 2.25. It's called the Curious Case of Bart Bass, and it is going to air on May 18th.