What episode does Gibbs And Director Shepard Have sex thanks!

there isnt really an episode but they have flash backs. Some i can think of are in Kill Ari Part 1 and Hatius Part 2 at least i think its part two might be one. Both of these r in season three hope i helped.

beach chick is right theyre flashbacks from paris in kill arie pt. 1 & hiatus pt. 2