Soyuz TM-4
In June 1988 , part way through EO-3 , Soyuz TM-4 was swapped for Soyuz TM-5 as the station's lifeboat . 
<triplet> Soyuz TM-4 <subj> Soyuz TM-5 <obj> followed by <triplet> Soyuz TM-5 <subj> Soyuz TM-4 <obj> follows