An ailing Will opens up to Joyce — with disturbing results. While Hopper digs for the truth, Eleven unearths a surprising discovery.

Wendy takes a career risk to relocate and join the team full time. Holden and Bill find it harder to keep the emotional intensity of work at bay.

Penny is horrified when Amy gives her a gift: a huge, quite horrible painting of the two of them. With no good way to avoid displaying it, she only hangs…

When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.

A group of six Los Angeles teens, fractured by a tragic loss, reunite only to discover that their parents may be hiding a terrible secret that turns their world upside…

The group faces a threat when they discover a new refugee is a spy working for Sentinel Services; Reed visits his estranged father and learns secrets that could prove useful.

Sheldon’s selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.

James and Alyssa arrive at a rundown town. James is unable to block out a memory from his past.

Clarke begins to question Lexa’s leadership decisions and Indra continues to push Octavia. Meanwhile, at Mount Weather, Jasper steps up into the role of leader, and Cage throws Maya into…

Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a “woman” he can talk to without being drunk, in the form of Siri…

Jesse connects with an unlikely source and learns more about God’s whereabouts. Tulip can’t forgive Jesse when she finds out he’s been lying to her.

Leonard, who broke up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two, and the duo contemplates on their relationship.

Ford orders a reluctant Bernard to conduct business as usual. Maeve looks to change the script for her storyline. Dolores finds it increasingly difficult to separate dreams from reality. Teddy…

Sheldon gets in trouble with Amy when he isn’t impressed by her recent accomplishment, and Howard must come to grips with Bernadette’s dislike of children.

While Weller and Nas chase a fugitive whistleblower in Bulgaria, Jane goes on a Sandstorm mission with Roman. Reade and Zapata must deal with an urgent matter.

The group is trapped inside an underground lab for military experiments, and Vanessa discovers that Axel has been hiding a secret about her past; Mohamad befriends a girl who doesn’t…

Leonard must face his fears after being contacted by his high school tormentor.

Dustin adopts a strange new pet, and Eleven grows increasingly impatient. A well-meaning Bob urges Will to stand up to his fears.

Clarke is faced with a difficult choice and Raven helps Bellamy navigate Mount Weather as Dr. Tsing begins to harvest the 47, while Jaha and Murphy encounter a stranger on…

Wendy considers an offer. Holden and Bill struggle to communicate the meaning of their findings to the judicial system in the baffling Altoona case.

When Stuart asks Amy out on a date, Sheldon must confront his feelings and consider where his relationship with Amy is going.

Leonard and Penny try hanging out as friends on a ‘non-date’, but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and…

When a fire breaks out on The Orville and a crew member dies, Alara begins to question if she is fit for her job, just as unusual and terrifying things…

Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.

In the fallout of their terrible act, real cracks begin to appear between James and Alyssa.

Eclipse’s ex-lover returns; Reed and Sage find alarming information about Lauren’s new friend; Thunderbird helps Blink open up about her past; Jace approves a special surveillance program.

A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

Jesse gets a much-needed breakthrough on his search for God. Tulip continues to spiral and Cassidy makes a life-altering decision for Denis.

Lincoln and Bellamy’s efforts to get into Mount Weather has some brutal consequences.

Sheldon’s mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she also spends time with the rest of the gang, instead of catering to his every demand.

With Theresa’s assistance, Charlotte Hale aims to expose dangerous flaws in Ford’s creations. William, Dolores and Lawrence journey into treacherous terrain. Maeve delivers an ultimatum to Lutz and Sylvester. With…

David faces his biggest challenge yet.

Sheldon and Leonard get invited to a party at Wil Wheaton’s house, and Howard gets an out-of-this-world opportunity.

After a prominent politician is almost killed during a rally, Weller and the team must work with U.S. Marshal Allie Knight to take down a mob leader.

Axel leads the surviving members of their group towards his old military base for shelter but finds it abandoned and in disrepair. With vampires closing in all around them, Axel…

David tries to find a way out of his predicament.

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.

After Will sees something terrible on trick-or-treat night, Mike wonders whether Eleven’s still out there. Nancy wrestles with the truth about Barb.

Holden and Bill return to a perplexing case in Pennsylvania where a set of clues leading in multiple directions leaves no shortage of suspects.

David goes back to where it all started.