Dr. Lopez

Dr. Lopez is Clyde's therapist who helps him deal with his obsession for Lori. She has also helped Howard, who tends to be overemotional.

Biography
Dr. Lopez is first mentioned in "Overnight Success" by Harold. When Howard is hesitant to let Clyde spend the night at Lincoln's house, Harold reminds Howard about how Dr. Lopez encourages parents to "let go" in such situations.

In "Two Boys and a Baby", Clyde mentions that Dr. Lopez has an extensive selection of magazines and books in her lobby. He is particularly interested in the books about how to take care of babies. Four of the book titles are Food for Tot, NapQuest: The Impossible Journey, Take a Walk on the Child Side, and Oopsie, My Baby Made a Poopsie.

In "Save the Date", Clyde is distressed after seeing Lori and Bobby together. He calls Dr. Lopez, telling her that it is a "Lori emergency," but is interrupted by Lincoln. Clyde calls her again at the end of the episode.

According to his bio, Clyde's idea of a perfect day would include a zombie movie marathon with Lincoln, a picnic with Howard and Harold, and a double-session with Dr. Lopez.

One of Clyde's quotes in the Cartoon Creator game is: "Dr. Lopez? Do you have any appointments this week?"

Clyde
Dr. Lopez and Clyde are apparently very close. Clyde knows her phone number and calls her whenever he comes across a "Lori emergency".

Howard and Harold
Dr. Lopez has met Howard and Harold. Whenever Howard starts to get emotional about seeing his son Clyde grow up, Harold reminds him about Dr. Lopez's teachings.

Other characters
It is unknown whether or not Dr. Lopez has met the Louds. However, Lincoln knows who she is, probably due to Clyde mentioning her often.

Trivia

 * A running gag is that Dr. Lopez is never shown on screen.
 * Closed captioning for the Latin American Spanish dub spells Dr. Lopez's name as López.
 * Articles from Digital Spy, Christian Today, and Christian Post have mentioned Dr. Lopez in reviews of "Overnight Success".