“Love, and friendship, and celebration” will be in good supply before CBS’ NCIS: Los Angeles fades to black. That’s the good word from series vet Daniela Ruah ahead of Part 1 of the series finale, which airs this Sunday at 10/9c. (Part 2 wraps things up on May 21 at 9 pm, leading into a one-hour retrospective special.) Of course, longtime fans of the OG NCIS offshoot have definite thoughts about what needs to happen during the series-ending two-parter. And in TVLine’s final NCIS: LA Q&A with Rua