Collocations for episode - noun

dramatic, exciting
bizarre, extraordinary
sad, tragic
shameful, unfortunate, unpleasant
latest
She has only told you about the latest episode in a long history of mental illness.

brief
major
acute, severe (medical)
an acute episode of pneumonia

recurrent (medical)
depressive, manic, psychotic (all medical)

remember
forget
experience

during an episode
during a brief episode of socialist rule

episode from
I still remember that episode from my childhood.

episode in
an extraordinary episode in American history

the entire episode, the whole episode
He says he just wants to forget the whole unfortunate episode.

exciting, thrilling
Don't miss next week's exciting episode!

classic
next, upcoming (esp. AmE)
previous
first, second, etc.
pilot
premiere (AmE)
final, last
two-part
half-hour, hour-long, one-hour, etc.

catch, see, watch
I caught a few episodes of seasons one and two.

miss
do, film, make, record, shoot
The next episode has not yet been filmed.

direct
air (esp. AmE), broadcast
repeat, rerun (AmE)

during an/the episode, in an/the episode
It happened in the final episode of ‘Star Trek’.