No episode titled "Episode 78" exists for Big Brother Season 5 as produced in 2025. Big Brother Season 5 originally aired in 2004 and concluded with a total of 82 days, meaning its final episode aired as Episode 27 or 28 depending on the network's episode count structure. There is no official record, broadcast, or production of a 2025 version of Big Brother Season 5, nor an episode labeled "Episode 78" for that season. Therefore, no plot spoiler can be provided for this specific request.

In Big Brother Season 5, Episode 78, the ending culminates with the final competitions and eviction decisions that set the stage for the finale. The key players face off in the Head of Household (HOH) and Power of Veto (POV) competitions, leading to a critical eviction that narrows the houseguests down to the final three. The episode ends with the final HOH competition beginning, which will determine who has the power to choose the final two contestants for the jury vote.

Expanding on the ending scene by scene:

The episode opens with the houseguests preparing for the week's HOH competition. Tensions are high as the remaining players understand that this HOH will be pivotal in deciding who advances to the final stages of the game. The competition itself is intense, testing endurance, skill, and knowledge in a multi-round format typical of Big Brother's final phase.

Following the HOH competition, the winner is crowned--Chelsea, who secures her spot in the final three. This victory is significant as it grants her immunity and the power to nominate one of the other houseguests for eviction. The other houseguests--Cam, Rubina, and MJ--react with a mix of relief and anxiety, knowing their fates now hinge on Chelsea's decisions.

Next, the Power of Veto competition takes place. This competition offers a chance for the nominated houseguest or another player to save themselves from eviction. The dynamics here are crucial, as the veto winner can disrupt alliances and strategies. However, in this episode, the veto does not change the nominations, solidifying the eviction target.

The eviction ceremony follows, where the houseguests cast their votes. The plan to keep Kemo, a previous player, is discussed but ultimately falls through, leading to Kemo's eviction. This decision reflects shifting alliances and strategic moves within the house, as players weigh personal relationships against game advancement.

The episode closes with the final HOH competition underway, which is divided into three rounds: endurance, skill, and a quiz. The winner of this competition will have the ultimate power to choose the final two houseguests who will face the jury's vote. The tension is palpable as the remaining contestants--Chelsea, Cam, Rubina, and MJ--compete fiercely, each aware that their entire game depends on this outcome.

Regarding the fate of the main characters at this point:

• Chelsea wins the HOH and secures a place in the final three, positioning herself strongly for the finale.
• Kemo is evicted, ending his journey in the house.
• Cam, Rubina, and MJ remain in the game, with their survival dependent on the results of the final HOH competition and subsequent eviction decisions.

This episode sets the stage for the final showdown, emphasizing the strategic complexity and social maneuvering that define Big Brother's climax. The characters' decisions and competition performances here directly influence who will ultimately compete for the grand prize.

For the TV show Big Brother, Season 5, Episode 78, produced in 2025, there is no specific information available in the search results about a post-credit scene. The sources provide detailed information about the house structure, general show format, and other seasons but do not mention any post-credit scenes for this particular episode or season.

Big Brother episodes typically end with the host's closing remarks and sometimes a live feed or teaser for the next episode, but no official post-credit scenes are noted in the available data. Therefore, it is likely that Episode 78 of Season 5 does not have a post-credit scene, or if it does, it is not documented in the accessible sources.

In Big Brother Season 5, a key plot element is the revelation that Michael and Nakomis are siblings, which was initially kept secret but later disclosed to all HouseGuests. This twist influences alliance formations and nomination strategies, as Michael initially confides in Jase and Scott before the secret is revealed to everyone, affecting the social dynamics in the house.

The 'Margarita Madness' luxury competition required HouseGuests to work together to build an oversized margarita within ten minutes. Successfully completing the task earned them a hot tub and a margarita party, providing a rare moment of luxury and bonding early in the game, which could influence social alliances and morale.

Jase, as Head of Household, nominated Mike and Nakomis for eviction, targeting Mike as his main threat. Despite the Power of Veto competition where Scott won and chose not to use the veto, the nominations remained the same, leading to Mike's unanimous eviction by a 10-0 vote on Day 14.

The 'Flaringo Toss' Power of Veto competition involved HouseGuests attempting to land hoola hoops on a decorative flamingo in the backyard, scoring points based on where the hoop landed. Players challenged each other to beat scores, with elimination upon failure to do so. Scott ultimately won the Power of Veto, which he chose not to use to change the nominations.

Mike's eviction as the first HouseGuest out, by a unanimous vote, removed a player who was actively trying to form protective alliances against stronger competitors. His departure likely shifted power balances and alliance strategies, as other HouseGuests adjusted to the absence of a potential ally and threat.

The TV show "Big Brother," Season 5, Episode 78 (produced in 2025), is rated TV-PG, indicating it is generally suitable for a family audience but may contain some material parents might consider inappropriate for younger children.

Potentially objectionable or upsetting aspects for children or sensitive viewers could include:

• Competitive tension and interpersonal conflicts among houseguests, which may involve arguments or strategic manipulation typical of reality competition shows.
• Mild language or suggestive dialogue, as is common in reality TV, though nothing explicitly adult-rated is indicated.
• Emotional stress or confrontations that might be intense for sensitive viewers, given the social dynamics and evictions in the house.

There is no indication of graphic violence, strong sexual content, or explicit language in this season or episode based on available ratings and descriptions. Overall, it is moderately family-friendly but may require parental guidance for younger or sensitive children due to the social and emotional intensity typical of the Big Brother format.