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While Caitlin and Charlie's love lives become peculiarly entangled, the mayor's deceased mother comes back to haunt him in the strangest way. Comedy, starring Charlie Sheen and Heather Locklear

Caitlin has a birthday surprise for Charlie in the shape of his father Ray, but theirs is not the best of relationships. Comedy, guest starring Martin Sheen, with Charlie Sheen and Heather Locklear

Amy puts Robert in charge of writing invitations to their forthcoming wedding, but he tries to evade responsibility by seeking advice from Ray and Frank. They tell him his best bet is to make an appalling mess of the job so she will have to do it all herself. With Brad Garrett and Ray Romano

Debra is too ill to take Ally to a pyjama party, so Ray reluctantly agrees to do the honours. Unfortunately it means coming face to face with Peggy, an old enemy who physically assaulted him during a charity event

Debra wonders how Ray would cope if she met an untimely end, and picks an attractive friend to replace her as his new wife - but cannot help being hurt by his enthusiastic response to the idea

The actor and his son Barney arrive in Texas, where they enjoy driving around in tanks, experience space travel in a centrifuge and hear campfire tales about UFOs. First up, the pair undertake some centrifuge training, which is used to prepare astronauts for the crushing gravitational forces produced at take-off from the extreme exhilaration. They also head to the outskirts of Houston to meet some UFO enthusiasts who investigate claimed sightings of extra-terrestrials, and are gripped by stories of spaceships blocking roads and people being taken by aliens for experiments

The actor and his son Barney embark on the final leg of their journey, which sees the pair arrive in the Louisiana city of New Orleans. Here, they visit a spiritual voodoo priest for a spot of energy cleansing, and feed alligators in the Bayou with Captain Billy, who knows every corner of the wetlands, having been born and raised on the bayous of South Louisiana. Later, Bradley hops on board the Natchez jazz Steamboat, before the pair take to the streets to lead a spectacular parade with a six-piece band

Part two of two. Rachel makes Ross regret playing a prank on her, while Monica and Chandler have a spot of good luck and Joey tries out his latest get-rich-quick scheme. Comedy, starring Jennifer Aniston, David Schwimmer and Matthew Perry

Ross and Rachel wake up the morning after their impromptu marriage and regret the hasty circumstances of the ceremony, while Monica and Chandler find that neither of them really wants to rush to the altar. Joey and Phoebe have a cross-country adventure. Comedy, starring David Schwimmer, Jennifer Aniston, Lisa Kudrow and Matt LeBlanc

Monica and Chandler decide to move in together, but have difficulty explaining to Rachel that she will not be a part of the arrangement. Meanwhile, Phoebe begs Ross to get his latest marriage annulled. American comedy, starring Jennifer Aniston and Courteney Cox

Ross encourages Chandler and Monica to move in together and makes a dramatic decision about Rachel. David Schwimmer, Matthew Perry, Courteney Cox and Jennifer Aniston star