Mariska Hargitay, Danny Pino and Richard Belzer on the set of Law and Order: SVU in New York Cit. Hargitay and Belzer are two of only three cast members to appear in every episode. Dann Florek who plays Captain Cragen is the other.
The three actors have appeared in 295 episodes. That is a hell of a total for a career and that is just for this series. I love SVU so much that I'm pretty sure I've seen all 295 episodes. Well maybe not all of them, but at least 294.