After watching seven specials meant to illuminate and revel in the impending nuptials of Prince Harry and the actress Meghan Markle, I can offer a variety of knowledge and wisdom to those who seek it. For starters, avoid all of these shows. They are repetitive and absent of meaningful insight. I gleaned only one fact that had any emotional effect on me whatsoever: The flavor of the royal wedding cake will be lemon elderflower. Heartbreaking.

Kensington Palace actually tweeted this detail in March — it escaped my notice until I saw it in “Inside the Royal Wedding: Harry and Meghan,” debuting Wednesday on NBC. It is probably the classiest and most informative of the specials, but not all that classy or informative, strictly speaking. In a scene meant to convey insider bona fides, one of Ms. Markle’s friends, the actress Janina Gavankar, holds up her phone to show off a selfie of the two of them. Except the Google URL is plainly visible; Ms. Gavankar has image-searched the photo that would ostensibly be on her own phone. This is the inside scoop? I have Google, too.

But still, it was more enlightening than “When Harry Met Meghan: A Royal Engagement” (TLC); “Meghan Markle: American Princess” (CBS); “Prince Harry’s Story: Four Royal Weddings” (NatGeo); “Meghan Markle: An American Princess” (Fox); “Harry and Meghan: A Very Modern Romance” (BBC America); and Lifetime’s fictionalized film version, “Harry & Meghan: A Royal Romance.” (These shows already debuted on television but are available to stream on network sites and elsewhere.)