reggie on mcgyver tv series

Rags to Riches- Pilot had Nick becoming a foster father to six orphan girls. But poor Nina was Chuck Cunninghamed, starting with episode two there were just five girls. She does appear in a clip show that includes scenes from the pilot.

Heartland- Marion Fleming was killed by a spooked horse during a bad storm in the pilot. That set up the original premise of teenage daughter Amy's grandfather Jack, Marion's father, taking care of her. Marion's other daughter and Amy's sister Lou moved back to Heartland from her job in the big city of New York.

Rick (Greg Lee) was the handyman at WNYX in the pilot episode of NewsRadio but was replaced by Joe (Joe Rogan) in the second episode and for the duration of the series with no explanation.

In the pilot episode of Brooklyn Nine-Nine, Detective Daniels

Boy Meets World ~ Topanga (Danielle Fishel) is shown to have a sister named Nebula (Krystee Clark),but she only appears in the Season 1 episode “She Loves Me, She Loves Me Not”...
unless you count Clark’s return as an entirely different character named Valerie in the Season 2 episode “Wrong Side of the Tracks.”

Eric Tramer, Jessie Spano's stepbrother, from "Saved by the Bell"

Spearchucker Jones on M*A*S*H (A black surgeon)

Spearchucker Jones on M*A*S*H (A black surgeon)

He was definitely on more than one episode.

Two animals. Tiger and Fluffy, disappeared on The Brady Bunch

He was definitely on more than one episode.

You are RIGHT, he was on 6 episodes.
I guess my brain was "FOGGY" on that one.

Good article
https://www.mashfaq.com/what-really-happened-to-spearchucker-jones-on-mash/

Didn’t The Golden Girls have a gay housekeeper in the pilot?

You are RIGHT, he was on 6 episodes.
I guess my brain was "FOGGY" on that one.

Good article
https://www.mashfaq.com/what-really-happened-to-spearchucker-jones-on-mash/

Also, while I think you’re right on Fluffy (someone else can confirm that), Tiger was definitely around past the first episode.

Didn’t The Golden Girls have a gay housekeeper in the pilot?

Yup. Coco.

Steve Urkel wasn’t available for the first episode of Family Matters

Mrs. Brown's daughter on My Favorite Martian.

Grandma and Grandpa on The Brady Bunch.