Episode 67 of "Angel"
s04e01 Deep Down

With Angel and Cordy missing for three months, Fred and Gunn are frustrated at the lack of clues regarding their friends' disappearance, especially after Connor is forced to kill the only eyewitness to Angel. Of course, actually Connor knows all about where Angel is and disposes of the vampire witness to cover his tracks. Meanwhile, Wes has captured Justine and while maintaining a sexual relationship with Lilah, is searching for Angel's sunken box. He eventually finds Angel, whose brain may be damaged from lack of blood. Giving up his own blood and letting Justine go, Wes tells Fred and Gunn about Connor's betrayal. They capture him and he escapes to confront Angel, who tells him he loves him but he has to get out. Meanwhile, Lilah arranges to get ahead in the ranks of Wolfram & Hart and Cordy is bored.