|Real Name:||Catherine Rollins|
|Title:||Lieutenant Catherine Rollins|
|Interests:|| Steve McGarrett (Ex) |
Billy Harrington (Ex)
|Affiliations:||Hawaii Five-0 Task Force|
|Portrayed by:||Michelle Borth|
Catherine Rollins is a former Navy Lieutenant in the United States and also a former intelligence officer who was originally assigned to the USS Enterprise and who is also the Ex-Girlfriend/Close Friend of Steve McGarrett. She aided the H50 team before eventually joining them presumably on a permanent basis during Season 4 before departing the team and Hawaii for good in the Season 4 episode, Makani 'Olu a Holo Malie as she went off searching for a young boy who had been kidnapped by the Taliban.
Born to an unnamed mother and father in an unknown State, Catherine later chose to join the United States Navy, rising to the rank of Lieutenant.
At some point in her Naval career, she met Steve McGarrett with the two eventually becoming close and even lovers at some point.
Catherine made her debut appearance in Nalowale where she was revealed to be McGarrett's girlfriend with the two even spending the night together in Steve's house.
In Makani 'Olu a Holo Malie (episode), after helping save a young boy and his family from the Taliban, Catherine rescued Steve from captivity and later sent him and Danny back to the United States, Catherine having chosen to stay behind in Afghanistan to help the young boy.
She has a blue star on the back of her neck which is visible in the Season 4 episode, Akanahe (episode).
Catherine appears briefly for the beginning three episodes of Season 6 for Kono and Adam's wedding. During Ua 'o'oloku ke anu i na mauna (episode), she leaves again, telling Steve that she was going to help provide supplies and aid for the people of Nepal, after their earthquake. However, at the end of the episode, it is revealed that this was a cover, and that she was joining an operation presumably with the Navy.
- Hand to Hand Combat -
- Languages - English, and Arabic
- Catherine risked being Court-Martialed for helping Lieutenant Commander Steven McGarrett with a civilian situation. 
- Unlike Steve McGarrett, Catherine and Billy Harrington both retired from the military, instead of joining the Reserves.   However, Billy still received a military funeral. 
- Commander Steven McGarrett was not Court-Martialed due to the fact that he and Catherine had entered the country as civillians without any intentions of using military equitment or informations. However after being attacked and Steve's catupture his military rank was discovered. Even after severer torture, and the threat of death he did not revealed any militarty secrets or information. The last part of his torture and execution was being recorded by camera, to which the military had gained access. Steve was rescused by his his fellow Navy SEALs seconds before his own decapitation.
- Michelle Borth was originally a recurring guest star up until the Season 3 premiere, La O Na Makuahine where she was added to the opening, resulting in her becoming a series regular.
- During her tenure on the team, Catherine wore a shoulder leather holster.
- Used a Smith & Wesson M&P as her personal sidearm.
- Has a Compact .32 ACP pistol (Seecamp LWS-32) which is seen in the Season 4 episode, Ua Nalohia.
|Ha'i'ole||Ua Lawe Wale||Kame'e||Mea Makamae||Ma'eme'e||Ka Hakaka Maika'i||Ka Iwi Kapu||Lapa'au||Ike Maka||Kil'ilua||Pahele||Alaheo Pau'ole|
|Ka Ho' Oponopono||Pu'olo||Mai Ka Wa Kahiko||I Helu Pu||Kupale||Lekio||Kalele||Ha'alele||Pa Make Loa||Ua Hopu||Ua Hala|
|Mai ho`oni i ka wai lana mâlie||Lehu a Lehu||Ua 'o'oloku ke anu i na mauna||Ka Papahana Holo Pono||Ka 'alapahi nui||Na Pilikua Nui||Na Kama Hele||Piko Pau 'iole||Hana Keaka||Ka Makau kaa kaua||Kulean||Ua Ola Loko I Ke Aloha||Umia Ka Hanu|
|Hoa 'Inea||Ke Koa Lokomaika'i||Ka Pohaku Kihi Pa'a||Waiwai||Kanaka Hahai||Malama Ka Po'e||Ka Haunaele||Ka Pono Ku'oko'a||I'ike Ke Ao||Pilina Koko||Pa'a Ka 'Ipuka I Ka 'Upena Nananana||O Ke Ali'I Wale No Ka'u Makemake|