Hawaii Five-0 Season 2 premiered on September 19, 2011 with the season finale, Ua Hala (episode), airing on May 7, 2011.
- Alex O'Loughlin as Lieutenant Commander Steve McGarrett (2010).
- Scott Caan as Detective Sergeant Danny Williams (2010).
- Daniel Dae Kim as Detective Lieutenant Chin Ho Kelly (2010).
- Grace Park as Officer Kono Kalakaua (2010).
- Masi Oka as Dr. Max Bergman.
- Richard T Jones as Governor Samuel Denning
- Teilor Grubbs as Grace Williams.
- Michelle Borth as Lieutenant Catherine Rollins.
- James Marsters as Victor Hesse.
- Lauren German as Agent Lori Weston
|25||1||Ha'i'ole (episode)||September 19th 2011||Season Premiere.|
|26||2||Ua Lawe Wale (episode)||September 26th 2011|
|27||3||Kame'e (episode)||October 3rd 2011|
|28||4||Mea Makamae (episode)||October 10th 2011|
|29||5||Ma'eme'e (episode)||October 17th 2011|
|30||6||Ka Hakaka Maika'i (episode)||October 24th 2011|
|31||7||Ka Iwi Kapu (episode)||October 31st 2011|
|32||8||Lapa'au (episode)||November 7th 2011|
|33||9||Ike Maka (episode)||November 14th 2011|
|34||10||Kil'ilua (episode)||November 21st 2011|
|35||11||Pahele (episode)||December 5th 2011|
|36||12||Alaheo Pau'ole (episode)||December 12th 2011|
|37||13||Ka Ho' Oponopono (episode)||January 2nd 2012|
|38||14||Pu'olo (episode)||January 16th 2012|
|39||15||Mai Ka Wa Kahiko (episode)||February 6th 2012|
|40||16||I Helu Pu (episode)||February 13th 2012|
|41||17||Kupale (episode)||February 20th 2012|
|42||18||Lekio (episode)||February 27th 2012|
|43||19||Kalele (episode)||March 19th 2012|
|44||20||Ha'alele (episode)||April 19th 2012|
|45||21||Pa Make Loa (episode)||April 30th 2012||Crossover episode with NCIS: Los Angeles. The storyline that began in this episode was later wrapped up in the NCIS: Los Angeles Season 3 episode, Touch of Death (episode).|
|46||22||Ua Hopu (episode)||May 7th 2012|
|46||23||Ua Hala (episode)||May 14th 2012||Season Finale.|
|Seasons of Hawaii Five-0 (2010)|
|Season 1 (2010) ♦ Season 2 (2010) ♦ Season 3 (2010) ♦ Season 4 (2010) ♦ Season 5 (2010)|