Jennifer Grey had " such bad anxiety " when she guest - starred as Mindy onFriendsthat she did n’t reprise the character when Mindy got married to Barry in Season 2 . So , she was recast .

1.First, inGilmore GirlsSeason 3, Lorelai begins dating Alex, whoBilly Burkeplays. He appeared in three episodes after Lorelai met him while attending a class with Sookie about how to run an inn. Eventually, he just disappears and we never learn why he and Lorelai broke up.

2.InSaved by the BellSeason 4, Leanna Creel starred as Tori Scott, who dated Zack for a short period of time. Leanne was brought on to the show afterTiffani Thiessenand Elizabeth Berkley left, with Kelly and Jessie disappearing. Tori’s episodes were randomly placed between episodes that were already filmed featuring Kelly and Jessie. Eventually, Tori just disappeared without any explanation, and she notably wasn’t included in the graduation episode.

3.In the second episode ofFriends, Carol, Ross' ex-wife who reveals she’s pregnant, is played by Anita Barone. Then, when Carol appeared later in Season 1, Jane Sibbett took over the role for the remainder of the series. Anitareportedlyleft the show because she wanted to find a more permanent role on another show instead of the guest star work she would get as Carol onFriends.

4.Also, inFriends, Rachel’s BFF Mindy notably gets together with her ex-fiancé Barry. When we first meet Mindy in Season 1, she’s played byJennifer Grey. However, when Mindy and Barry’s wedding finally happens in Season 2, she’s now played by Jana Marie Hupp.

5.WhenCrazy Ex-Girlfriendbegan, Greg, who became one of Rebecca’s love interests, was played by Santino Fontana. He played the role for 22 episodes, but when Greg came back in the final season, Santino was replaced by Skylar Astin. The show even poked fun at the new casting in the show by having Rebecca begin to see Greg in a whole new way.

6.WhenBewitchedbegan in 1964, Darrin, Samantha’s husband, was played by Dick York. He played the role for five seasons before Dick Sargent took over the role for the remainder of the series.According to the New York Times, Dick Y. left the show “when problems stemming from an old back injury, including overdependence on painkillers, forced him to leave.”

8.InTrue BloodSeason 6, Luke Grimes played James; however, when the show returned for Season 7, and James began a romantic relationship with Lafayette, Luke was replaced by Nathan Parsons. Originally citing creative differences, it was later revealed that Luke wasreportedlyuncomfortable playing a gay character.

9.InGame of ThronesSeason 3, Ed Skrein played Daario Naharis, Daenerys Targaryen’s love interest; however, after the season, he was replaced by Michiel Huisman. At the time, Edtold EW, “My plan was to stay withGame of Thronesfor the long haul. That was always my plan. I would have loved to. It was a wonderful experience, but politics led to us parting ways.”

11.InThe GoldbergsSeason 4, Adam’s girlfriend Jackie is introduced, and Rowan Blanchard portrays her. Rowan played the role for 11 episodes. However, when Jackie returned in Season 6 after their breakup, she was now played by Alexis G. Zall. At the time of the recast, creator Adam F. Goldbergtweeted, “I did not recast anyone. The actress passed for the season.”

12.In the pilot episode ofArrow, Jacqueline MacInnes Wood portrayed Sara Lance, who was secretly having an affair with Oliver when they shipwrecked five years before he returned to Starling City. When Sara returned in Season 2, after Oliver believed she was dead, Jacqueline was replaced by Caity Lotz.

13.And finally, Nick Jonas guest-starred inLast Man Standingin Season 1 as Ryan, Kristin’s ex and father of her son. He appeared in one episode before he was replaced by Jordan Masterson, who played the character for the remainder of the series.

Top: Lorelai and Alex conversing and smiling indoors. Bottom: Lorelai and Alex talking outdoors at night with street fog visible

Top: Zack Morris talking to Tori. Bottom: Tori in conversation with Zach in a shop class. Both from "Saved by the Bell."

Top image: Anita Barone as Carol in "Friends." Bottom image: Jane Sibbett in a scene with David Schwimmer in "Friends"

Top image: Jennifer Gray sitting on a couch in "Friends" as Mindy. Bottom image: Jana Marie Hupp in a wedding dress as Mindy in "Friends"

Top image: Santino Fontana singing. Bottom image: Skylar Astin sitting and looking thoughtful in an outdoor setting

Dick York in "Bewitched" Season 1, and Dick Sargent in "Bewitched" Season 6, both portraying the character Darrin Stephens

Split image showing a scene from Season 1 and Season 2 of TV show "Shameless" featuring characters Ian (Cameron Monaghan) and Mandy (Emma Greenwell and Jane Levy)

Top image: Luke Grimes shirtless in "True Blood" Season 6. Bottom image: Nathan Parsons wearing a leather jacket in a diner in "True Blood" Season 7

Ed Skrein as Daario vs Michiel Huisman as Daario in Game of Thrones

Article image

Top: Rowan Blanchard in Season 4 of "The Goldbergs." Bottom image: Alexis G. Zall in Season 6

Jacqueline MacInnes Wood as Sara Lance in the "Arrow" pilot vs. Caity Lotz as Sara in Season 2

Nick Jonas as Ryan in Season 1 of "Last Man Standing" vs. Jordan Masterson as Ryan