<P> Olsen portrays Detective Marty Deeks on the CBS show NCIS : Los Angeles . His character appeared in two episodes of season one before joining the cast as a series regular in the second season . </P>
<P> Olsen portrays Detective Marty Deeks on the CBS show NCIS : Los Angeles . His character appeared in two episodes of season one before joining the cast as a series regular in the second season . </P>
when did eric christian olsen join ncis la
when did eric christian olsen join ncis la
in the second season
in the second season