TMP: Captain's chair upholstered in gray ergonomic pads. Peneumatic armrests serve as restraint device ("seatbelt"). Motorized headrests change height automatically
WOK: Enteprise chairs reupholstered in what appears to be white or gray coverings. Chair arms and headrests no longer motorized.
Reliant chairs appear as they did in TMP, with ergonomic pads.
ST3SFS: Enterprise chairs appear as they did in WOK. Note captain's chair arm.
USS Grissom chairs recovered in PINK!
USS Excelsior gets wacky overdesigned cartoon chairs.
Star Trek 4 TVH: chairs with ergonomic pads similar to TMP, but upholstered in blue and gray. Some pads that were individual in TMP are merged together by the covering.
Star Trek 5 TFF: Complete Bridge redesign. Captain's chair becomes bigger, more padded, has control panels like Picard's in late-season TNG. Other chairs are now smaller office-style chairs.
Star Trek 6 TUC: more pads, lighter upholstery.
Excelsior Bridge: Captain's chair lacks additional back pads, upholstered in blue.